Perhaps you should try some spelling variations:
thu sach » thuat sach, thuoc sach, thu hoach
va thanh » gia thanh, ban thanh, va tinh
cham xuc » cam xuc, chat xuc, cham soc
tu sach » su sach, te sach, tu cach
va hanh » van hanh, va danh, ban hanh
hieu va » lieu va, hieu qua
va cham » va chat, va tham
sang ma » tang ma, nang ma, sang tao
ky sang » ky nang, ky dang, ky tang
va hieu » van hieu, va dieu, va hien
ma hoi » mai hoi, xa hoi, ma hoa
vai va » mai va, dai va, hai va

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) or (thu sach)) ky sang ma hoi. hieu va cham xuc ((va hanh) or (va thanh)) vai va hieu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (thu sach)) ky sang ma hoi. hieu va cham xuc ((va hanh) OR (va thanh)) vai va hieu.
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (thu sach)) ky sang ma hoi. hieu va cham xuc ((va hanh) or (va thanh)) vai va hieu*.