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
truc va » thuc va, thuc vat, trung va
cua te » cua tu
luc va » duc va, tuc 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 (truc 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 (truc 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 (truc va)) hanh hai ((cuu tre) or (cua te))*.