Perhaps you should try some spelling variations:
hanh nien » thanh nien, hanh kien, thanh vien
su triet » su viet, su tien, ve triet
su sach » so sach, vu sach
sach vu » sach va, sach tu, sach uu
vu nang » vuc nang, va nang, vu dang
tai hoi » tai khoi, dai hoi, tai hai
dai moi » doi moi, dai hoi
hieu va » lieu va, hieu qua
xuc van » luc van, vuc van, xuc ban
duc van » duc va, duc tan, duc manh
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 vu nang ((tai hoi) or (dai moi)). hieu va cam ((xuc van) or (duc van)) hanh nien su triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach vu nang ((tai hoi) OR (dai moi)). hieu va cam ((xuc van) OR (duc van)) hanh nien su triet.
• Adding a wildcard symbol may retrieve word variants: su sach vu nang ((tai hoi) or (dai moi)). hieu va cam ((xuc van) or (duc van)) hanh nien su triet*.