Perhaps you should try some spelling variations:
van khang » van khanh, van thanh, van quang
sach haya » sach han, sach ha, sach nay
sach hay » sach han, sach ha, sach nay
khang vi » khang voi, hang vi, hang va
dang xay » dang van, van xay
xuc van » duc van, luc van, vuc van
cua tre » cua te, cuu tre, cua triet
xay hoi » xa hoi, tay hoi, cay phoi
ve cac » va cac, vien cac
vi cua » vai cua, di cua
ve cam » ve cham, va cam, ve cai

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

• Performing a fuzzy search may retrieve terms with similar spellings: te ((sach hay) or (sach haya)) dang xay hoi. hieu ((ve cam) OR (ve cac)) xuc van khang vi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te ((sach hay) OR (sach haya)) dang xay hoi. hieu ((ve cam) OR (ve cac)) xuc van khang vi cua tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te ((sach hay) or (sach haya)) dang xay hoi. hieu ((ve cam) OR (ve cac)) xuc van khang vi cua tre*".