Perhaps you should try some spelling variations:
van hanh » van thanh, ban hanh, van anh
su triet » su viet, su tien, ve triet
nang xa » nang x, lang xa, nang ma
hieu va » hieu qua
cam duc » cam xuc, cao duc, pham duc
duc van » duc va, duc tan, duc manh
hanh va » hang va, hanh vi
tu san » thu san, tu ban, tu can

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((tu cac) or (tu san)) ky nang xa hoi. ((lieu va) or (hieu va)) cam duc van hanh va su triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu cac) OR (tu san)) ky nang xa hoi. ((lieu va) OR (hieu va)) cam duc van hanh va su triet.
• Adding a wildcard symbol may retrieve word variants: ((tu cac) or (tu san)) ky nang xa hoi. ((lieu va) or (hieu va)) cam duc van hanh va su triet*.