Perhaps you should try some spelling variations:
danh dien » dinh dien, danh kien, danh lien
cham hoc » cham soc, chat hoc, cham hoi
te sach » toc sach
cuc tre » cua tre, cuu tre, cuc thue
va danh » va dinh, va dan, va hanh
hieu ve » hieu va, hieu van
ve cham » va cham, ve chat, vu cham
tai hai » thi hai, dai hai, tai ha
tai hoi » tai khoi, dai hoi, tai hoe
duc tre » duoc tren, duc tien
sach v » sach va, sach y, sach 2
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 (tai hai)). hieu ve cham hoc va danh dien ((cuc tre) OR (duc tre))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach v nang ((tai hoi) OR (tai hai)). hieu ve cham hoc va danh dien ((cuc tre) OR (duc tre))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach v nang ((tai hoi) or (tai hai)). hieu ve cham hoc va danh dien ((cuc tre) OR (duc tre))*".