Perhaps you should try some spelling variations:
chu triet » cau triet, chet triet, chua thiet
hieu van » hieu va, thien van, lieu va
cau thuc » cau truc, cuu thuc, can thuc
dinh hai » dinh thai, tinh hai, dinh ha
vu sach » vu bach, su sach, vu khach
so sach » so sanh, bo sach, co sach
nang xa » nang x, lang xa, nang ma
van cau » van dau, van hau, van chat
thuc va » thuc vat, thuc dan, thuc day
va dinh » van dinh, va kinh, va tinh
hai chu » hai chau, hoi chu, hai chi
y nang » ky nang, ly nang, v nang

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((vu sach) or (so sach)) y nang xa hoi. hieu van cau thuc va dinh hai chu triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((vu sach) OR (so sach)) y nang xa hoi. hieu van cau thuc va dinh hai chu triet.
• Adding a wildcard symbol may retrieve word variants: ((vu sach) or (so sach)) y nang xa hoi. hieu van cau thuc va dinh hai chu triet*.