Perhaps you should try some spelling variations:
sach cam » sach cap, mach cam, sach tham
nang mai » nang ma, nang tai, lang mai
nam truc » nam truoc, nam thuc, nam trung
hanh lai » hanh lam, hanh tai, thanh lap
cua viet » ca viet, hoa viet, cua vat
su sach » so sach, vu sach
mai hoi » mai khoi, dai hoi, lai hoi
va hanh » van hanh, va thanh, va danh
lai cua » dai cua, hai cua, lai chau

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

• Performing a fuzzy search may retrieve terms with similar spellings: su sach cam nang mai hoi. hieu qua ((cau truc) or (nam truc)) va hanh lai cua viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach cam nang mai hoi. hieu qua ((cau truc) OR (nam truc)) va hanh lai cua viet.
• Adding a wildcard symbol may retrieve word variants: su sach cam nang mai hoi. hieu qua ((cau truc) or (nam truc)) va hanh lai cua viet*.