Perhaps you should try some spelling variations:
lang van » dang van, tang van, hoang van
pham cuc » pham chuc, pham duc, pham cua
tu sach » thu sach, su sach, te sach
sach ky » sac ky, sach y, sach ty
tinh va » tich va, trinh van, trinh vat
tinh vi » trinh vi, tinh voi, dinh vi
cuc ban » cua ban, cac ban, cuu ban
hieu va » lieu va, hieu qua
hieu ve » hieu van
van hoi » van hoa, van hoc, van hoe
ky lang » ky nang, ky dang, ky tang
cua tre » cua te, cuu tre, cua triet

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 lang van hoi. ((hieu ve) or (hieu va)) pham cuc ban ((tinh vi) OR (tinh va)) cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky lang van hoi. ((hieu ve) OR (hieu va)) pham cuc ban ((tinh vi) OR (tinh va)) cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ky lang van hoi. ((hieu ve) or (hieu va)) pham cuc ban ((tinh vi) OR (tinh va)) cua tre".
• Adding a wildcard symbol may retrieve word variants: tu sach ky lang van hoi. ((hieu ve) or (hieu va)) pham cuc ban ((tinh vi) OR (tinh va)) cua tre*.