Perhaps you should try some spelling variations:
hay quang » ha quang, hao quang, tay quang
toc sach » hoc sach, thuoc sach, nuoc sach
nam thuc » nam thuoc, am thuc, nam thu
doc sach » hoc sach, nuoc sach, dac sac
quang xa » quan xa, quang ma, quang va
vai cuu » vai cua
cuu tre » cua tre, cau tren, cau treo
hieu va » lieu va, hieu qua
va dan » ca dan, va dau, va dap
va dao » ca dao
va nam » van nam, ha nam, va nay

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((toc sach) or (doc sach)) hay quang xa hoi. hieu va nam thuc ((va dan) OR (va dao)) vai cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((toc sach) OR (doc sach)) hay quang xa hoi. hieu va nam thuc ((va dan) OR (va dao)) vai cuu tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((toc sach) or (doc sach)) hay quang xa hoi. hieu va nam thuc ((va dan) OR (va dao)) vai cuu tre".
• Adding a wildcard symbol may retrieve word variants: ((toc sach) or (doc sach)) hay quang xa hoi. hieu va nam thuc ((va dan) OR (va dao)) vai cuu tre*.