Perhaps you should try some spelling variations:
hang dien » quang dien, dang dieu, nhan dien
va triet » va thiet, va trien, ve triet
tuc van » thuc van, truc van, tuc va
cac tuc » cac toc, cac tu, cac tac
so sanh » do sanh
nang xa » nang x, lang xa, mang xa
nang ma » tang ma, sang ma, nang cao
hieu ve » hieu va, hieu van
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 (nang ma)) hoi. hieu ve cac tuc van ((hang dien) or (hanh vi)) va triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sanh y ((nang xa) OR (nang ma)) hoi. hieu ve cac tuc van ((hang dien) OR (hanh vi)) va triet*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "so sanh y ((nang xa) OR (nang ma)) hoi. hieu ve cac tuc van ((hang dien) or (hanh vi)) va triet*".