Perhaps you should try some spelling variations:
cua triet » cua viet, su triet
thu sach » tu sach, thuat 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
va vanh » va danh, va hanh, va anh
va cam » va cham, va cac, va cao

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

• Performing a fuzzy search may retrieve terms with similar spellings: thu sach ky nang xa hoi. hieu va cam xuc ((va vanh) or (va van)) tai ((cua triet) OR (va triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach ky nang xa hoi. hieu va cam xuc ((va vanh) OR (va van)) tai ((cua triet) OR (va triet)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu sach ky nang xa hoi. hieu va cam xuc ((va vanh) or (va van)) tai ((cua triet) OR (va triet))".
• Adding a wildcard symbol may retrieve word variants: thu sach ky nang xa hoi. hieu va cam xuc ((va vanh) or (va van)) tai ((cua triet) OR (va triet))*.