Perhaps you should try some spelling variations:
thuat sach » thuat lanh, thuat san
hanh lai » hanh lam, hanh tai, thanh lap
chau tre » chay tren, chau tho, cho tre
sach ky » sac ky, sach y, sach ty
ky sang » ky nang, ky dang, ky tang
sang ma » tang ma, nang ma, sang tao
ve chat » van chat
va chat » van chat, va phat, hoa chat
va hanh » van hanh, va thanh, va danh
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: thuat sach ky sang ma hoi. hieu ((ve chat) or (((va chat) or (cao chat)))) duc va hanh lai chau tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thuat sach ky sang ma hoi. hieu ((ve chat) OR (((va chat) OR (cao chat)))) duc va hanh lai chau tre.
• Adding a wildcard symbol may retrieve word variants: thuat sach ky sang ma hoi. hieu ((ve chat) or (((va chat) or (cao chat)))) duc va hanh lai chau tre*.