Perhaps you should try some spelling variations:
thuc dan » thuc hanh, hoc dan, thuc vat
so sanh » do sanh
hieu ve » hieu va, hieu van
nang xa » nang x, nang ma, mang xa
lang xa » lang ha, dang xay, lang van
sanh y » sinh y, anh y, hanh y
ve cam » ve cham, ve cac, va cam
tuc va » thuc va, truc va, tuc xa
vi cua » vai cua, di cua

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 ((nang xa) or (lang xa)) hoi. hieu ve cam ((tuc va) or (thuc dan)) hanh vi cua vat~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sanh y ((nang xa) OR (lang xa)) hoi. hieu ve cam ((tuc va) OR (thuc dan)) hanh vi cua vat.
• Adding a wildcard symbol may retrieve word variants: so sanh y ((nang xa) or (lang xa)) hoi. hieu ve cam ((tuc va) or (thuc dan)) hanh vi cua vat*.