Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
tien va » dien va, thien van
vien va » dien va, vien da, viec va
va tinh » may tinh
nam luc » nang luc, nhan luc, nam thuc
sac ky » cac ky, sai ky
luc va » duc va, tuc va, loc va
ma hoi » mai hoi, xa hoi, me hoi
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 nang ((ma hoi) OR (ma hoa)). hieu van nam luc va tinh ((vien va) or (tien va)) triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sac ky nang ((ma hoi) OR (ma hoa)). hieu van nam luc va tinh ((vien va) OR (tien va)) triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sac ky nang ((ma hoi) OR (ma hoa)). hieu van nam luc va tinh ((vien va) or (tien va)) triet".
• Adding a wildcard symbol may retrieve word variants: tu sac ky nang ((ma hoi) OR (ma hoa)). hieu van nam luc va tinh ((vien va) or (tien va)) triet*.