Perhaps you should try some spelling variations:
cua triet » cua viet, su triet
tinh viet » trinh viet, ninh viet, dinh viet
thien van » thi van
va triet » va thiet, va trien, ve triet
hieu van » hieu va, lieu va, hieu ve
va tinh » may tinh
nam luc » nang luc, nhan luc, nam thuc
sang ma » tang ma, nang ma, sang tao
ky sang » ky nang, ky dang, ky tang
luc va » duc va, tuc va, loc va
san ky » sang ky, van ky, dan ky
ma hoi » mai hoi, xa hoi, ma hoa
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 san ky sang ma hoi. ((hieu van) or (thien van)) nam luc va tinh viet ((cua triet) OR (va triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu san ky sang ma hoi. ((hieu van) OR (thien van)) nam luc va tinh viet ((cua triet) OR (va triet)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu san ky sang ma hoi. ((hieu van) or (thien van)) nam luc va tinh viet ((cua triet) OR (va triet))".
• Adding a wildcard symbol may retrieve word variants: tu san ky sang ma hoi. ((hieu van) or (thien van)) nam luc va tinh viet ((cua triet) OR (va triet))*.