Perhaps you should try some spelling variations:
nang dai » nang dau, nang tai, lang dai
hanh hai » thanh hai, nhanh hai, hang hai
su sach » so sach, vu sach
dai hai » dai han, dai hoi, dai tai
hieu ve » hieu va, hieu van
cuu tre » cua tre, cau tren, cau treo
sach ky » sac ky, sach y, sach ty
cua te » cua tu
tuc va » thuc va, truc va, tuc xa
luc va » duc va, loc va
ve cam » ve cham, ve cac, va cam

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

• Performing a fuzzy search may retrieve terms with similar spellings: su sach ky nang dai hai. hieu ve cam ((luc va) OR (tuc va)) hanh hai ((cuu tre) or (cua te))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ky nang dai hai. hieu ve cam ((luc va) OR (tuc va)) hanh hai ((cuu tre) OR (cua te)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ky nang dai hai. hieu ve cam ((luc va) OR (tuc va)) hanh hai ((cuu tre) or (cua te))".
• Adding a wildcard symbol may retrieve word variants: su sach ky nang dai hai. hieu ve cam ((luc va) OR (tuc va)) hanh hai ((cuu tre) or (cua te))*.