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