Perhaps you should try some spelling variations:
cham thuc » nham thuc, pham thuc, tham thuc
thu sach » tu sach, thuat sach, thuoc sach
qua cham » qua hai, qua cac, va cham
va triet » va thiet, va trien, ve triet
su sach » so sach, vu sach
ky lang » ky dang, ky tang, tay lang
thuc va » thuc vat, thuc dan, thuc day
va danh » va dinh, va dan, va hanh
danh vi » hanh vi, dinh vi, danh di
vi va » vi van, vai va, vu va

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) or (thu sach)) ((ky lang) or (ky nang)) xa hoi. hieu qua cham thuc va danh vi va triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((su sach) OR (thu sach)) ((ky lang) OR (ky nang)) xa hoi. hieu qua cham thuc va danh vi va triet.
• Adding a wildcard symbol may retrieve word variants: ((su sach) or (thu sach)) ((ky lang) or (ky nang)) xa hoi. hieu qua cham thuc va danh vi va triet*.