Perhaps you should try some spelling variations:
ve triet » va trien, su triet
so sach » bo sach, co sach, hoc sach
so sanh » do sanh
ty nang » ky nang, ty xang, ty hang
nang xa » nang x, lang xa, nang ma
hieu ve » hieu va, hieu van
cam duc » cam xuc, cao duc, pham duc
va hanh » van hanh, va thanh, va danh
vi ve » va ve, gi ve, ve ve

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)) ty nang xa hoi. ((hieu ve) or (hieu qua)) cam duc va hanh vi ve triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((so sach) OR (so sanh)) ty nang xa hoi. ((hieu ve) OR (hieu qua)) cam duc va hanh vi ve triet.
• Adding a wildcard symbol may retrieve word variants: ((so sach) or (so sanh)) ty nang xa hoi. ((hieu ve) or (hieu qua)) cam duc va hanh vi ve triet*.