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

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) OR (o hai)). hieu va cac du va ((danh di) or (xanh di)) cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu sac ky nang ((o hoi) OR (o hai)). hieu va cac du va ((danh di) OR (xanh di)) cuu tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "vu sac ky nang ((o hoi) OR (o hai)). hieu va cac du va ((danh di) or (xanh di)) cuu tre*".