Perhaps you should try some spelling variations:
su triet » su viet, su tien, 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
bo sach » co sach, hoc sach
nang xa » lang xa, nang ma, mang xa
hieu ve » hieu va, hieu van
cac tuc » cac toc, cac tu, cac tac
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: bo sach y ((nang xa) OR (nang x)) hoi. hieu ve cac tuc van ((hang di) or (hang vi)) su triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: bo sach y ((nang xa) OR (nang x)) hoi. hieu ve cac tuc van ((hang di) OR (hang vi)) su triet*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "bo sach y ((nang xa) OR (nang x)) hoi. hieu ve cac tuc van ((hang di) or (hang vi)) su triet*".