Perhaps you should try some spelling variations:
cua triet » su triet, va triet
toc sach » hoc sach, doc sach, thuoc sach
nhan luc » nang luc
nang dau » hang dau, xang dau, nang du
cham cuu » cap cuu, chat cua
cua viet » ca viet, hoa viet, cua vat
hieu vu » hieu va, hieu ve, hieu su
sach ky » sac ky, sach y, sach ty
va nang » van nang, da nang, cam nang
tang ma » mang may, tang van
ky tang » ky nang, ky dang, kho tang
ma hoi » mai hoi, xa hoi, ma hoa

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: toc sach ky tang ma hoi. hieu vu ((nhan luc) or (cham cuu)) va nang dau ((cua triet) or (cua viet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc sach ky tang ma hoi. hieu vu ((nhan luc) OR (cham cuu)) va nang dau ((cua triet) OR (cua viet)).
• Adding a wildcard symbol may retrieve word variants: toc sach ky tang ma hoi. hieu vu ((nhan luc) or (cham cuu)) va nang dau ((cua triet) or (cua viet))*.