Perhaps you should try some spelling variations:
hanh vai » hanh vi, hanh va, hanh tai
hieu van » hieu va, thien van, lieu va
tu sach » thu sach, su sach, te sach
sach ky » sac ky, sach y, sach ty
cuu tre » cau tren, cau treo
cua tre » cua te, cua triet, dua tren
van cam » van nam, van lam, van cau
tang ma » mang may, tang van
ky tang » ky nang, ky dang, kho tang
xuc xa » tuc xa
buc xa » tuc xa
ma hoi » mai hoi, xa hoi, ma hoa

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 tang ma hoi. hieu van cam ((xuc xa) OR (buc xa)) hanh vai ((cuu tre) or (cua tre))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky tang ma hoi. hieu van cam ((xuc xa) OR (buc xa)) hanh vai ((cuu tre) OR (cua tre))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ky tang ma hoi. hieu van cam ((xuc xa) OR (buc xa)) hanh vai ((cuu tre) or (cua tre))*".