Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
cac trung » cac truong, dac trung, bac trung
cam trung » cam truong, nam trung, cao trung
va hanh » van hanh, va thanh, va danh
so sach » bo sach, co sach, hoc sach
hieu ve » hieu va, hieu van
nang xa » nang x, lang xa, nang ma
so sanh » do sanh
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 (so sanh)) y nang xa hoi. hieu ve ((cam trung) or (cac trung)) va hanh vi cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((so sach) OR (so sanh)) y nang xa hoi. hieu ve ((cam trung) OR (cac trung)) va hanh vi cua triet*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((so sach) OR (so sanh)) y nang xa hoi. hieu ve ((cam trung) or (cac trung)) va hanh vi cua triet*".