Perhaps you should try some spelling variations:
toc sach » hoc sach, doc sach, thuoc sach
hieu van » hieu va, thien van, lieu va
thanh va » thanh van, hanh va, thanh ha
tay lang » tai lang, tay tang, tay quang
lam xuc » cam xuc, lam duoc
van lam » van nam
ty lang » ty xang, ty hang, tu lang
xuc va » duc va, tuc va, luc va
cua te » cua tu

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

• If you are trying to use Boolean operators, they must be ALL CAPS: toc sach ((ty lang) OR (tay lang)) xa hoi. hieu van lam xuc va ((hanh vi) OR (thanh va)) cua te~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "toc sach ((ty lang) OR (tay lang)) xa hoi. hieu van lam xuc va ((hanh vi) or (thanh va)) cua te~".
• Adding a wildcard symbol may retrieve word variants: toc sach ((ty lang) OR (tay lang)) xa hoi. hieu van lam xuc va ((hanh vi) or (thanh va)) cua te*.