Perhaps you should try some spelling variations:
vao triet » va triet, mao triet, va trien
toc sach » hoc sach, doc sach, thuoc sach
nang xa » nang x, lang xa, nang ma
hieu va » hieu qua
xuc van » luc van, vuc van, xuc ban
duc van » duc va, duc tan, duc manh
hanh ve » hanh vi, hanh va, hanh kem
sach v » sach va, sach y, sach 2
v nang » va nang, vu nang, van nang
ve vao » ve van, ve bao, ve dao

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

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