Perhaps you should try some spelling variations:
toc sach » hoc sach, doc sach, thuoc sach
tu cach » tu cac
ve cham » va cham, ve chat, vu cham
anh dai » vanh dai, anh bai, anh dat
luc van » luoc van, luu van, duc van
xuc van » duc van, vuc van, xuc ban
hieu ve » hieu va, hieu van
nang o » nang co, nang ho, nang ro
v nang » va nang, vu nang, van nang
cua te » cua tu
o hoi » co hoi, o hoc, o hai

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((tu cach) or (toc sach)) v nang o hoi. hieu ve cham ((xuc van) or (luc van)) anh dai cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu cach) OR (toc sach)) v nang o hoi. hieu ve cham ((xuc van) OR (luc van)) anh dai cua te.
• Adding a wildcard symbol may retrieve word variants: ((tu cach) or (toc sach)) v nang o hoi. hieu ve cham ((xuc van) or (luc van)) anh dai cua te*.