Perhaps you should try some spelling variations:
thu sach » tu sach, thuat sach, thuoc sach
duc manh » suc manh, duc anh, duc minh
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
xuc van » duc van, luc van, xuc ban
va co » vo co
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: thu sach ky nang xa hoi. hieu va co ((xuc van) or (duc manh)) hanh vi va triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach ky nang xa hoi. hieu va co ((xuc van) OR (duc manh)) hanh vi va triet.
• Adding a wildcard symbol may retrieve word variants: thu sach ky nang xa hoi. hieu va co ((xuc van) or (duc manh)) hanh vi va triet*.