Perhaps you should try some spelling variations:
dat duoc » dat nuoc, da duoc, luat duoc
ky tang » ky nang, ky dang, kho tang
tang ma » mang may, tang van
hieu ve » hieu va, hieu van
va hanh » van hanh, va thanh, ban hanh
va danh » va dinh, va dan, dia danh
cua tre » cua te, cuu tre, cua triet
vu san » va san, vu ban
san ky » sang ky, van ky, dan ky
ve dat » de dat, va dat, ve dao
di cua » dai cua, doi cua, de cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: vu san ky tang ma hoa. hieu ve dat duoc ((va hanh) or (va danh)) di cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu san ky tang ma hoa. hieu ve dat duoc ((va hanh) OR (va danh)) di cua tre*.