Perhaps you should try some spelling variations:
van chat » cao chat
vuc nang » cuc nang, vu nang, chuc nang
van nang » van quang, van ban, van dong
hieu van » hieu va, thien van, lieu va
vat cuu » vat cua
dan vat » dang vat, van vat, dan va
te sach » toc sach
cuu tre » cua tre, cau tren, cau treo
xuc va » duc va, tuc va, xac va
luc va » duc va, tuc va, loc va
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: te sach ((vuc nang) or (van nang)) o hoi. hieu van chat ((xuc va) or (luc va)) dan vat cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ((vuc nang) OR (van nang)) o hoi. hieu van chat ((xuc va) OR (luc va)) dan vat cuu tre.
• Adding a wildcard symbol may retrieve word variants: te sach ((vuc nang) or (van nang)) o hoi. hieu van chat ((xuc va) or (luc va)) dan vat cuu tre*.