Perhaps you should try some spelling variations:
tinh viec » tinh viet, dinh viec, sinh viec
hieu van » hieu va, thien van, lieu va
cua viet » hoa viet, cua vat, cua dieu
ky tang » ky nang, ky dang, kho tang
tang xa » trang xa, tang ma, lang xa
nam xuc » cam xuc, nam xua, nam thuc
xuc may » xuc hay, truc may, phuc may
ca viet » va viet, co viet, hoa viet
tu bac » tu ban, tu bat, tu bai

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((tu bac) or (tu cac)) ky tang xa hoi. hieu van nam xuc may tinh viec ((cua viet) OR (ca viet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu bac) OR (tu cac)) ky tang xa hoi. hieu van nam xuc may tinh viec ((cua viet) OR (ca viet)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu bac) or (tu cac)) ky tang xa hoi. hieu van nam xuc may tinh viec ((cua viet) OR (ca viet))".
• Adding a wildcard symbol may retrieve word variants: ((tu bac) or (tu cac)) ky tang xa hoi. hieu van nam xuc may tinh viec ((cua viet) OR (ca viet))*.