Perhaps you should try some spelling variations:
dien cuu » dien cuc, dien cu, dien cua
dan dien » doan dien, danh dien, dan den
te sach » toc sach
tu cham » toc cham, thi cham
vu cham » va cham, vu kham, qua cham
tai hoi » tai khoi, tai hai, tai hoe
dai hoi » dai hoc, dai hai, dai moi
cuu tre » cua tre, cau tren, cau treo
sach v » sach va, sach y, sach 2
doc va » duoc va, hoc va, duc va
va dan » ca dan, va dao, va dau
v nang » va nang, vu nang, van nang

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 v nang ((tai hoi) or (dai hoi)). hieu ((vu cham) OR (tu cham)) doc va dan dien cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach v nang ((tai hoi) OR (dai hoi)). hieu ((vu cham) OR (tu cham)) doc va dan dien cuu tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach v nang ((tai hoi) or (dai hoi)). hieu ((vu cham) OR (tu cham)) doc va dan dien cuu tre".
• Adding a wildcard symbol may retrieve word variants: te sach v nang ((tai hoi) or (dai hoi)). hieu ((vu cham) OR (tu cham)) doc va dan dien cuu tre*.