Perhaps you should try some spelling variations:
van hanh » van thanh, ban hanh, van anh
so sanh » do sanh
lang xa » lang ha, dang xay, lang van
hieu ve » hieu van
hieu va » lieu va, hieu qua
cac tuc » cac toc, cac tu, cac tac
tuc van » thuc van, truc van, tuc va
sanh y » sinh y, anh y, hanh y
vi cua » vai cua, di cua

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: so sanh y ((nang x) OR (lang xa)) hoi. ((hieu ve) OR (hieu va)) cac tuc van hanh vi cua vat~.
• Adding a wildcard symbol may retrieve word variants: so sanh y ((nang x) or (lang xa)) hoi. ((hieu ve) or (hieu va)) cac tuc van hanh vi cua vat*.