Perhaps you should try some spelling variations:
tu sach » thu sach, su sach, te sach
sach ky » sac ky, sach y, sach ty
anh van » anh va, thanh van, doanh van
hieu va » hieu qua
cac tuc » cac toc, cac tu, cac tac
danh vi » hanh vi, danh di, danh va
dinh vi » dinh ve, dinh viet, dinh tri
ky anh » ky danh, ly anh, ty anh
tuc va » thuc va, truc va, tuc xa
cua te » cua tu

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu sach ky anh van hoa. ((hieu va) or (lieu va)) cac tuc va ((danh vi) OR (dinh vi)) cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky anh van hoa. ((hieu va) OR (lieu va)) cac tuc va ((danh vi) OR (dinh vi)) cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ky anh van hoa. ((hieu va) or (lieu va)) cac tuc va ((danh vi) OR (dinh vi)) cua te".
• Adding a wildcard symbol may retrieve word variants: tu sach ky anh van hoa. ((hieu va) or (lieu va)) cac tuc va ((danh vi) OR (dinh vi)) cua te*.