Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
toc sach » hoc sach, doc sach, thuoc sach
sach ky » sac ky, sach y, sach ty
nang xa » nang x, lang xa, nang ma
hieu va » lieu va, hieu qua
va pham » van pham, va phat, va phap
va dinh » van dinh, va tinh, vu dinh
va kinh » va tinh, qua kinh
cua te » cua tu

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 nang xa hoi. hieu va pham duc ((va dinh) or (va kinh)) lam ((cua triet) or (cua te))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc sach ky nang xa hoi. hieu va pham duc ((va dinh) OR (va kinh)) lam ((cua triet) OR (cua te)).
• Adding a wildcard symbol may retrieve word variants: toc sach ky nang xa hoi. hieu va pham duc ((va dinh) or (va kinh)) lam ((cua triet) or (cua te))*.