Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
va doanh » van doanh, vay doanh, va danh
cham luc » cham soc, nhan luc, cham cuu
cua tre » cua te, cuu tre, dua tren
hieu va » lieu va, hieu qua
nang ma » tang ma, sang ma, nang cao
hieu ve » hieu van
sac ky » cac ky, sai ky
luc va » duc va, tuc va, loc va
ma hoi » mai hoi, xa hoi, ma hoa
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. ((hieu ve) OR (hieu va)) cham luc va doanh tai ((cua triet) or (cua tre))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sac ky nang ma hoi. ((hieu ve) OR (hieu va)) cham luc va doanh tai ((cua triet) OR (cua tre)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sac ky nang ma hoi. ((hieu ve) OR (hieu va)) cham luc va doanh tai ((cua triet) or (cua tre))".
• Adding a wildcard symbol may retrieve word variants: tu sac ky nang ma hoi. ((hieu ve) OR (hieu va)) cham luc va doanh tai ((cua triet) or (cua tre))*.