Perhaps you should try some spelling variations:
su triet » su viet, su tien, ve triet
kho tang » cao tang
ky tang » ky nang, ky dang, ky trong
hieu ve » hieu va, hieu van
danh va » doanh va, hanh va, dan va
te sach » toc sach
ma hoi » mai hoi, xa hoi, ma hoa
ve dam » ven dam, ke dam, va dam
dam tu » nam tu, cam tu, tam tu
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 ((ky tang) OR (kho tang)) ma hoi. hieu ve dam tu va ((danh va) or (anh va)) su triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ((ky tang) OR (kho tang)) ma hoi. hieu ve dam tu va ((danh va) OR (anh va)) su triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ((ky tang) OR (kho tang)) ma hoi. hieu ve dam tu va ((danh va) or (anh va)) su triet".
• Adding a wildcard symbol may retrieve word variants: te sach ((ky tang) OR (kho tang)) ma hoi. hieu ve dam tu va ((danh va) or (anh va)) su triet*.