Perhaps you should try some spelling variations:
toc sach » hoc sach, doc sach, thuoc sach
cham xuc » cam xuc, chat xuc, pham duc
sach ky » sac ky, sach y, sach ty
nang ma » tang ma, sang ma, nang cao
hieu vu » hieu va, hieu ve, hieu su
va dinh » van dinh, va kinh, va tinh
ma hoi » mai hoi, xa hoi, ma hoa
cua tu » cua tuc, cua su, cua cu

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 ky nang ma hoi. hieu vu ((cham xuc) or (cham soc)) va dinh ket ((cua te) or (cua tu))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc sach ky nang ma hoi. hieu vu ((cham xuc) OR (cham soc)) va dinh ket ((cua te) OR (cua tu)).
• Adding a wildcard symbol may retrieve word variants: toc sach ky nang ma hoi. hieu vu ((cham xuc) or (cham soc)) va dinh ket ((cua te) or (cua tu))*.