Perhaps you should try some spelling variations:
danh gia » dan gian
hieu va » lieu va, hieu qua
xanh di » danh di, vanh dai, xanh tai
cuu tre » cua tre, cau tren, cau treo
vu sac » vu sach, vu san, va sac
sac ky » cac ky, sai ky
nang o » nang co, nang ho, nang ro
o hoi » co hoi, o hoc, o hai
du va » dau va, tu va, su va

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

• Performing a fuzzy search may retrieve terms with similar spellings: vu sac ky nang o hoi. hieu va cac du va ((danh gia) or (xanh di)) cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu sac ky nang o hoi. hieu va cac du va ((danh gia) OR (xanh di)) cuu tre*.