Perhaps you should try some spelling variations:
thanh hai » thanh phan, thanh hoa, thanh san
hanh hai » nhanh hai, hang hai, hanh tai
cuu tre » cua tre, cau tren, cau treo
hieu va » lieu va, hieu qua
nang xa » nang x, lang xa, nang ma
sac ky » cac ky
cac lo » cac lop, cac co, cac bo
lo va » lo van, lao va, ly va

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

• If you are trying to use Boolean operators, they must be ALL CAPS: thu ((sac ky) OR (sai ky)) nang xa hoi. hieu va cac lo va ((hanh hai) OR (thanh hai)) cuu tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu ((sac ky) or (sai ky)) nang xa hoi. hieu va cac lo va ((hanh hai) OR (thanh hai)) cuu tre~".
• Adding a wildcard symbol may retrieve word variants: thu ((sac ky) or (sai ky)) nang xa hoi. hieu va cac lo va ((hanh hai) OR (thanh hai)) cuu tre*.