Perhaps you should try some spelling variations:
trung van » truong van, trong van, trung va
cac trung » cac truong, dac trung, bac trung
cua triet » cua viet, su triet, va triet
van hanh » van thanh, ban hanh, van anh
so sach » so sanh, bo sach, hoc sach
co sach » bo sach, cuon sach, hoc sach
vu sach » vu bach, su sach, vu khach
nang xa » nang x, lang xa, nang ma
hieu va » lieu va, hieu qua
y nang » ky nang, ly nang, v nang
vi cua » vai cua, di cua

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

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