Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
su triet » su viet, su tien, ve triet
cao hoi » co hoi, cao hoc, tao hoi
nam luc » nang luc, nhan luc, nam thuc
va tinh » may tinh
dien su » dien tu, nien su, den su
tu sac » tu sach, tu cac, tu san
sac ky » cac ky, sai ky
luc va » duc va, tuc va, loc 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) OR (cau hoi)). hieu van nam luc va tinh dien su triet~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sac ky nang ((cao hoi) OR (cau hoi)). hieu van nam luc va tinh dien su triet".
• Adding a wildcard symbol may retrieve word variants: tu sac ky nang ((cao hoi) OR (cau hoi)). hieu van nam luc va tinh dien su triet*.