Perhaps you should try some spelling variations:
hieu ve » hieu va, hieu van
thu dan » thuc dan, thu dang, thu ban
dan dan » dang dan, ban dan, dao dan
cuu tre » cua tre, cau tren, cau treo
vu sac » vu sach, vu san, va sac
sac ky » cac ky, sai ky
ve nam » he nam, va nam, le nam
dan di » danh di, dan da, dan de
di cuu » di cau, di cua, dinh cuu

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 ((x ho) or (xa hoi)). hieu ve nam thu dan dan di cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu sac ky nang ((x ho) OR (xa hoi)). hieu ve nam thu dan dan di cuu tre.
• Adding a wildcard symbol may retrieve word variants: vu sac ky nang ((x ho) or (xa hoi)). hieu ve nam thu dan dan di cuu tre*.