Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
cac thue » cuc thue, cac thu, cach thuc
su triet » su viet, su tien, ve triet
sach ty » sach tu, sach thu, xach tay
nang xa » nang x, lang xa, nang ma
van cac » van hac, van cau, van bac
thue va » thuc va, thuyet va, thuc vat
danh va » doanh va, hanh va, dan va
anh va » hanh va

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: te ((sach y) or (sach ty)) nang xa hoi. hieu van cac thue va ((danh va) OR (anh va)) su triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te ((sach y) OR (sach ty)) nang xa hoi. hieu van cac thue va ((danh va) OR (anh va)) su triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te ((sach y) or (sach ty)) nang xa hoi. hieu van cac thue va ((danh va) OR (anh va)) su triet".
• Adding a wildcard symbol may retrieve word variants: te ((sach y) or (sach ty)) nang xa hoi. hieu van cac thue va ((danh va) OR (anh va)) su triet*.