Perhaps you should try some spelling variations:
nam thuc » nam thuoc, am thuc, nam thu
va triet » va thiet, va trien, cua triet
ve triet » va trien, su triet
su sach » so sach, vu sach
sach ty » sach y, sach tu, sach thu
ty nang » ky nang, ty xang, ty hang
nang xa » nang x, lang xa, nang ma
va hanh » van hanh, va thanh, va danh

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

• Performing a fuzzy search may retrieve terms with similar spellings: su sach ty nang xa hoi. hieu qua ((nam thuc) or (cam xuc)) va hanh vi ((va triet) or (ve triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ty nang xa hoi. hieu qua ((nam thuc) OR (cam xuc)) va hanh vi ((va triet) OR (ve triet)).
• Adding a wildcard symbol may retrieve word variants: su sach ty nang xa hoi. hieu qua ((nam thuc) or (cam xuc)) va hanh vi ((va triet) or (ve triet))*.