Perhaps you should try some spelling variations:
doc sach » hoc sach, toc sach, nuoc sach
thi hang » thi hanh, thi nang, thi hong
hoc anh » hoc nganh, hoc nhanh, ngoc anh
hang xa » hoang xa, hang va, hang ca
hieu va » lieu va, hieu qua
xuc van » duc van, luc van, xuc ban
vuc van » duc van, luc van, thuc van
minh vi » minh voi, dinh vi, minh va
cua tre » cua te, cuu tre, cua triet
va cam » va cham, va cac, va cao
vi cua » vai cua, di cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((doc sach) or (hoc anh)) thi hang xa hoi. hieu va cam ((xuc van) or (vuc van)) minh vi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((doc sach) OR (hoc anh)) thi hang xa hoi. hieu va cam ((xuc van) OR (vuc van)) minh vi cua tre.
• Adding a wildcard symbol may retrieve word variants: ((doc sach) or (hoc anh)) thi hang xa hoi. hieu va cam ((xuc van) or (vuc van)) minh vi cua tre*.