Perhaps you should try some spelling variations:
dan dien » doan dien, danh dien, dan den
nang tai » hang tai, tang tai, sang tai
te sach » toc sach
cuu tre » cau tren, cau treo
cua tre » cua te, cua triet, dua tren
vu cham » va cham, vu kham, tu cham
hieu vu » hieu va, hieu ve, hieu su
tai hoi » tai khoi, dai hoi, tai hai
sach v » sach va, sach y, sach 2
v nang » va nang, vu nang, van nang
soc va » loc va, doc va, goc va

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