Perhaps you should try some spelling variations:
toc sach » hoc sach, doc sach, thuoc sach
va triet » va thiet, va trien, ve triet
sach ky » sac ky, sach y, sach ty
nang xa » nang x, lang xa, nang ma
hieu va » lieu va, hieu qua
cao xuc » cam xuc, cao duc, cao suc
va hanh » van hanh, va thanh, va danh
va cao » va cac, va co, va dao
xuc va » duc va, tuc va, luc va
cua tu » cua tuc, cua su, cua cu

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 cao xuc va hanh vi ((((cua te) OR (cua tu))) OR (va triet))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "toc sach ky nang xa hoi. hieu va cao xuc va hanh vi ((((cua te) OR (cua tu))) OR (va triet))".
• Adding a wildcard symbol may retrieve word variants: toc sach ky nang xa hoi. hieu va cao xuc va hanh vi ((((cua te) OR (cua tu))) OR (va triet))*.