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
tu sach » thu sach, su sach, te sach
sach ky » sac ky, sach y, sach ty
hieu va » lieu va, hieu qua
hieu vu » hieu ve, hieu su, dieu vu
lang xa » lang ha, dang xay, lang van
ky lang » ky nang, ky dang, ky tang
cuu tre » cua tre, cau tren, cau treo
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 sach ky lang xa hoi. ((hieu vu) OR (hieu va)) cham luc va doanh tai ((cua triet) or (cuu tre))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky lang xa hoi. ((hieu vu) OR (hieu va)) cham luc va doanh tai ((cua triet) OR (cuu tre)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ky lang xa hoi. ((hieu vu) OR (hieu va)) cham luc va doanh tai ((cua triet) or (cuu tre))".
• Adding a wildcard symbol may retrieve word variants: tu sach ky lang xa hoi. ((hieu vu) OR (hieu va)) cham luc va doanh tai ((cua triet) or (cuu tre))*.