Perhaps you should try some spelling variations:
thuat sach » thuat lanh, thuat san
te sach » toc sach
ky tang » ky nang, ky dang, kho tang
tang ma » mang may, tang van
ve cham » va cham, ve chat, vu cham
va hanh » van hanh, va thanh, va danh
cua tre » cua te, cuu tre, cua triet
ma hoi » mai hoi, xa hoi, ma hoa
vi cua » vai cua, di cua

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: ((thuat sach) or (te sach)) ky tang ma hoi. hieu ((ve cham) or (va cac)) duc va hanh vi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((thuat sach) OR (te sach)) ky tang ma hoi. hieu ((ve cham) OR (va cac)) duc va hanh vi cua tre.
• Adding a wildcard symbol may retrieve word variants: ((thuat sach) or (te sach)) ky tang ma hoi. hieu ((ve cham) or (va cac)) duc va hanh vi cua tre*.