Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
cham luc » nhan luc, cham cuu, chat lua
va doanh » van doanh, vay doanh, va danh
tu sach » thu sach, su sach, te sach
sach ky » sac ky, sach y, sach ty
nang xa » nang x, lang xa, nang ma
hieu vu » hieu va, hieu ve, hieu su
cuu tre » cua tre, cau tren, cau treo

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 nang xa hoi. hieu vu ((cham luc) OR (cham soc)) va doanh tai ((cua triet) or (cuu tre))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky nang xa hoi. hieu vu ((cham luc) OR (cham soc)) va doanh tai ((cua triet) OR (cuu tre)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ky nang xa hoi. hieu vu ((cham luc) OR (cham soc)) va doanh tai ((cua triet) or (cuu tre))".
• Adding a wildcard symbol may retrieve word variants: tu sach ky nang xa hoi. hieu vu ((cham luc) OR (cham soc)) va doanh tai ((cua triet) or (cuu tre))*.