Perhaps you should try some spelling variations:
va triet » va thiet, va trien, ve triet
tu sach » thu sach, su sach, te sach
sach ky » sac ky, sach y, sach ty
nang xa » nang x, lang xa, nang ma
hieu va » lieu va, hieu qua
xuc van » luc van, vuc van, xuc ban
duc van » duc va, duc tan, duc manh
va cao » va cac, va co, va dao
vi va » vi van, vai va, vu va

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

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