Perhaps you should try some spelling variations:
van triet » va triet, van thiet, van trieu
su sach » so sach, vu sach
sach ky » sac ky, sach y, sach ty
nang xa » nang x, lang xa, nang ma
hieu va » lieu va, hieu qua
luc van » luoc van, luu van, luc va
duc van » duc va, duc tan, duc manh
hanh va » hanh vi
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: su sach ky nang xa hoi. hieu va cam ((luc van) or (duc van)) ((hanh va) or (hang va)) van triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ky nang xa hoi. hieu va cam ((luc van) OR (duc van)) ((hanh va) OR (hang va)) van triet.
• Adding a wildcard symbol may retrieve word variants: su sach ky nang xa hoi. hieu va cam ((luc van) or (duc van)) ((hanh va) or (hang va)) van triet*.