Perhaps you should try some spelling variations:
huu them » huu thu, huu thuc, huu liem
dang van » hoang van, hang va
hanh dai » hanh tai, hanh dao, vanh dai
sach ky » sac ky, sach y, sach ty
huu tre » huu tri, cuu tre, huu tien
va hanh » van hanh, va thanh, va danh
vu sach » vu bach, su sach, vu khach
hieu va » lieu va
ky dang » ky nang, ky danh
cac tuc » cac toc, cac tu, cac tac
tuc va » thuc va, truc va, tuc xa

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

• Performing a fuzzy search may retrieve terms with similar spellings: vu sach ky dang van hoa. ((hieu va) OR (hieu qua)) cac tuc va hanh dai ((huu tre) or (huu them))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu sach ky dang van hoa. ((hieu va) OR (hieu qua)) cac tuc va hanh dai ((huu tre) OR (huu them)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "vu sach ky dang van hoa. ((hieu va) OR (hieu qua)) cac tuc va hanh dai ((huu tre) or (huu them))".
• Adding a wildcard symbol may retrieve word variants: vu sach ky dang van hoa. ((hieu va) OR (hieu qua)) cac tuc va hanh dai ((huu tre) or (huu them))*.