Perhaps you should try some spelling variations:
nam thuoc » nam thu, nha thuoc, cay thuoc
dieu cua » dieu tra
lang van » dang van, tang van, hoang van
nam thuc » am thuc, nam thu, nam tu
so sanh » do sanh
va danh » va dinh, va dan, va hanh
van hoi » van hoa, van hoc, van hoe
hieu he » hieu ve, hiem he, hieu le
va dao » ca dao
cua te » cua tu
sanh y » sinh y, anh y, hanh y
y lang » o lang, _ lang, tay lang

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

• Performing a fuzzy search may retrieve terms with similar spellings: so sanh y lang van hoi. hieu he ((nam thuc) OR (nam thuoc)) ((va danh) or (va dao)) dieu cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sanh y lang van hoi. hieu he ((nam thuc) OR (nam thuoc)) ((va danh) OR (va dao)) dieu cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "so sanh y lang van hoi. hieu he ((nam thuc) OR (nam thuoc)) ((va danh) or (va dao)) dieu cua te".
• Adding a wildcard symbol may retrieve word variants: so sanh y lang van hoi. hieu he ((nam thuc) OR (nam thuoc)) ((va danh) or (va dao)) dieu cua te*.