Perhaps you should try some spelling variations:
ve triet » va trien, su triet
sach tay » xach tay, sach hay, sach nay
thanh va » thanh van, hanh va, thanh ha
thanh vi » hanh vi, thanh ve, nhanh vi
vien cac » vien bach, vien dai, vien da
tay lang » tai lang, tay tang, tay quang
su sach » so sach, vu sach
ve cac » va cac
toc va » hoc va, toc ta, tuc va
lang o » lang _, tang o, lang son
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: su sach tay lang o hoi. hieu ((ve cac) or (vien cac)) toc va ((thanh vi) or (thanh va)) ve triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach tay lang o hoi. hieu ((ve cac) OR (vien cac)) toc va ((thanh vi) OR (thanh va)) ve triet.
• Adding a wildcard symbol may retrieve word variants: su sach tay lang o hoi. hieu ((ve cac) or (vien cac)) toc va ((thanh vi) or (thanh va)) ve triet*.