Perhaps you should try some spelling variations:
tinh vien » tinh dien, tinh viet, tinh hien
su triet » su viet, su tien, ve triet
cao hoi » cau hoi, co hoi, cao hoc
qua nam » quan nam, cua nam, quang nam
tu sac » tu sach, tu cac, tu san
sac ky » cac ky, sai ky
luc va » duc va, tuc va
loc va » hoc va

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 nang cao hoi. hieu qua nam ((luc va) or (loc va)) ((tinh vien) or (sinh vien)) su triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sac ky nang cao hoi. hieu qua nam ((luc va) OR (loc va)) ((tinh vien) OR (sinh vien)) su triet.
• Adding a wildcard symbol may retrieve word variants: tu sac ky nang cao hoi. hieu qua nam ((luc va) or (loc va)) ((tinh vien) or (sinh vien)) su triet*.