Perhaps you should try some spelling variations:
khanh vai » khanh van, hanh vi, hanh va
xa khanh » xa thanh, van khanh, dat khanh
tu sach » thu sach, su sach, te sach
sach ky » sac ky, sach y, sach ty
cuu tre » cau tren, cau treo
lai cam » lai nam, lai tam, lai chau
cua tre » cua te, cua triet, dua tren
lan cam » ban cam, phan cam, gian cam
tang ma » mang may, tang van
ky tang » ky nang, ky dang, kho tang
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. thi ((lan cam) OR (lai cam)) tuc xa khanh 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. thi ((lan cam) OR (lai cam)) tuc xa khanh 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. thi ((lan cam) OR (lai cam)) tuc xa khanh vai ((cuu tre) or (cua tre))".
• Adding a wildcard symbol may retrieve word variants: tu sach ky tang ma hoi. thi ((lan cam) OR (lai cam)) tuc xa khanh vai ((cuu tre) or (cua tre))*.