Perhaps you should try some spelling variations:
va triet » va thiet, va trien, ve triet
hang vi » hang va, hanh vi, khang voi
hang di » hang doi, hang dien, hang dich
tuc van » thuc van, truc van, tuc va
cac tuc » cac toc, cac tu, cac tac
so sanh » do sanh
hieu ve » hieu va, hieu van
lang xa » lang ha, dang xay, lang van
nang xa » nang x, nang ma, mang xa
sanh y » sinh y, anh y, hanh y
ve cac » va cac, vien cac

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 cac tuc van ((hang di) or (hang vi)) va triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sanh y ((nang xa) OR (lang xa)) hoi. hieu ve cac tuc van ((hang di) OR (hang vi)) va triet*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "so sanh y ((nang xa) OR (lang xa)) hoi. hieu ve cac tuc van ((hang di) or (hang vi)) va triet*".