Perhaps you should try some spelling variations:
van chat » cao chat
hieu van » hieu va, thien van, lieu va
danh vai » danh sai, danh va, doanh van
sach thu » sach thue, sach thieu, sach tham
vai cuu » vai cua
sach ty » sach y, sach tu, xach tay
cuu tre » cua tre, cau tren, cau treo
xuc va » duc va, luc va, xac va
tuc va » thuc va, truc va, tuc xa
nang o » nang co, nang ho, nang ro
o hoc » co hoc, mo hoc, so hoc

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu ((sach ty) or (sach thu)) nang o hoc. hieu van chat ((xuc va) or (tuc va)) danh vai cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((sach ty) OR (sach thu)) nang o hoc. hieu van chat ((xuc va) OR (tuc va)) danh vai cuu tre.
• Adding a wildcard symbol may retrieve word variants: tu ((sach ty) or (sach thu)) nang o hoc. hieu van chat ((xuc va) or (tuc va)) danh vai cuu tre*.