Perhaps you should try some spelling variations:
nang doc » nang luc
cau luc » cau truc, cau phuc
doc hoi » duoc hoi, hoc hoi, doc hai
hieu ve » hieu va, hieu van
va hanh » van hanh, va thanh, va danh
de cua » le cua, te cua, dieu cua
ve cua » le cua, te cua, ve cum
tu sac » tu sach, tu cac, tu bac
luc va » duc va, tuc va, loc va
tu san » thu san, tu ban, tu can
ve cau » ke cau, va cau, ve cac

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) or (tu san)) ky nang doc hoi. hieu ve cau luc va hanh ((ve cua) or (de cua)) triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sac) OR (tu san)) ky nang doc hoi. hieu ve cau luc va hanh ((ve cua) OR (de cua)) triet.
• Adding a wildcard symbol may retrieve word variants: ((tu sac) or (tu san)) ky nang doc hoi. hieu ve cau luc va hanh ((ve cua) or (de cua)) triet*.