Perhaps you should try some spelling variations:
cua triet » cua viet, va triet
tinh viec » tinh viet, dinh viec, sinh viec
su triet » su viet, su tien, ve triet
hieu van » hieu va, thien van, lieu va
va tinh » may tinh
ky sang » ky nang, ky dang, ky tang
ma hoi » mai hoi, ma hoa, me hoi
sac ky » cac ky, sai ky
van am » van nam, van lam, van dam
am hoc » ad hoc
tu sac » tu sach, tu cac, tu san

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu sac ky sang ((ma hoi) or (xa hoi)). hieu van am hoc va tinh viec ((cua triet) or (su triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sac ky sang ((ma hoi) OR (xa hoi)). hieu van am hoc va tinh viec ((cua triet) OR (su triet)).
• Adding a wildcard symbol may retrieve word variants: tu sac ky sang ((ma hoi) or (xa hoi)). hieu van am hoc va tinh viec ((cua triet) or (su triet))*.