Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
hieu van » hieu va, thien van, lieu va
cuu thuc » cuu tac
nang xa » nang x, lang xa, nang ma
so sach » so sanh, bo sach, co sach
van cuu » van cau, van chu, van cu
va dinh » van dinh, va tinh, vu dinh
va kinh » va tinh, qua kinh
hai cua » thai cua, dai cua, hoi cua
su sach » vu sach
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: ((su sach) or (so sach)) y nang xa hoi. hieu van cuu thuc ((va dinh) OR (va kinh)) hai cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((su sach) OR (so sach)) y nang xa hoi. hieu van cuu thuc ((va dinh) OR (va kinh)) hai cua triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((su sach) or (so sach)) y nang xa hoi. hieu van cuu thuc ((va dinh) OR (va kinh)) hai cua triet".
• Adding a wildcard symbol may retrieve word variants: ((su sach) or (so sach)) y nang xa hoi. hieu van cuu thuc ((va dinh) OR (va kinh)) hai cua triet*.