Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
hanh vai » hanh vi, hanh va, hanh tai
vai cuu » vai cua
van cam » van nam, van lam, van cau
sach ty » sach y, sach thu, xach tay
nang co » nang cao, nang doc, nang noi
sach tu » sach thu, cach tu, sach uu
cuu tre » cua tre, cau tren, cau treo
co hoi » co hoc, co loi
xuc va » duc va, tuc va, xac va
luc va » duc va, tuc va, loc va

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 ty) or (sach tu)) nang co hoi. hieu van cam ((xuc va) or (luc va)) hanh vai cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su ((sach ty) OR (sach tu)) nang co hoi. hieu van cam ((xuc va) OR (luc va)) hanh vai cuu tre.
• Adding a wildcard symbol may retrieve word variants: su ((sach ty) or (sach tu)) nang co hoi. hieu van cam ((xuc va) or (luc va)) hanh vai cuu tre*.