Perhaps you should try some spelling variations:
toc sach » hoc sach, doc sach, thuoc sach
sach ly » sach y, sach lo, sach ty
cua tre » cua te, cua triet, dua tren
anh vai » anh va, anh bai, anh van
cuu tre » cau tren, cau treo
cau luc » cau truc, cau phuc
hieu ve » hieu va, hieu van
nang ma » tang ma, sang ma, nang cao
ly nang » ky nang, ly hang, ly vang
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: toc sach ly nang ma hoi. hieu ve ((cau luc) or (cam xuc)) tuan anh vai ((cua tre) OR (cuu tre))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc sach ly nang ma hoi. hieu ve ((cau luc) OR (cam xuc)) tuan anh vai ((cua tre) OR (cuu tre)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "toc sach ly nang ma hoi. hieu ve ((cau luc) or (cam xuc)) tuan anh vai ((cua tre) OR (cuu tre))".
• Adding a wildcard symbol may retrieve word variants: toc sach ly nang ma hoi. hieu ve ((cau luc) or (cam xuc)) tuan anh vai ((cua tre) OR (cuu tre))*.