Perhaps you should try some spelling variations:
thu sach » tu sach, thuat sach, thuoc sach
va thanh » gia thanh, ban thanh, va tinh
tai chau » lai chau, mai chau, hai chau
chat xuc » chat huu, cam xuc, chao xu
chau tre » chay tren, chau tho, cho tre
hieu ve » hieu va, hieu van
ve chat » va chat, van chat
sach ky » sac ky, sach y, sach ty
va hanh » van hanh, va danh, ban hanh
cao hoi » co hoi, cao hoc, tao hoi

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

• Performing a fuzzy search may retrieve terms with similar spellings: thu sach ky nang ((cao hoi) or (cau hoi)). hieu ve chat xuc ((va hanh) or (va thanh)) tai chau tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach ky nang ((cao hoi) OR (cau hoi)). hieu ve chat xuc ((va hanh) OR (va thanh)) tai chau tre.
• Adding a wildcard symbol may retrieve word variants: thu sach ky nang ((cao hoi) or (cau hoi)). hieu ve chat xuc ((va hanh) or (va thanh)) tai chau tre*.