Perhaps you should try some spelling variations:
mai hoi » mai khoi, dai hoi, lai hoi
hieu va » lieu va, hieu qua
va danh » va dinh, va dan, va hanh
danh di » danh du, xanh di, danh dien
cua tre » cua te, cuu tre, cua triet
vu sai » vu hai, vu san, vu dai
sai ky » sac ky
va dat » va dao, va dau, va dap
di cua » dai cua, doi cua, de cua
nuoc » quoc, duoc, ngoc

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

• Performing a fuzzy search may retrieve terms with similar spellings: vu sai ky nang ((mai hoi) or (xa hoi)). hieu va dat nuoc va danh di cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu sai ky nang ((mai hoi) OR (xa hoi)). hieu va dat nuoc va danh di cua tre*.