Perhaps you should try some spelling variations:
"third liquid chromatography" » "thin liquid chromatography", "hire liquid chromatography", "chiral liquid chromatography"
"think layer chromatography" » "thin layer chromatography", "thick layer chromatography", "think later chromatography"
"think gas chromatography" » "thin gas chromatography", "think fast chromatography", "think case chromatography"

Try widening your search to All Fields.

You may be able to get more results by adjusting your search query.

• If you are trying to use Boolean operators, they must be ALL CAPS: (((("think layer chromatography") OR ("think gas chromatography"))) OR ("third liquid chromatography")).
• Removing quotes may allow a broader search: (((( think layer chromatography ) or ( think gas chromatography ))) or ( third liquid chromatography )).
• Adding a wildcard symbol may retrieve word variants: (((("think layer chromatography") or ("think gas chromatography"))) or ("third liquid chromatography"))*.