Perhaps you should try some spelling variations:
ban thanh » ban hanh, ban hang
kho tang » cao tang
mai hoi » mai khoi, dai hoi, lai hoi
hoi cua » hoi chuc
hai cua » thai cua, dai cua, lai cua
hieu ve » hieu va, hieu van
xac kho » cac khoi, dac khoa, cac khoa
cam duc » cam xuc, cao duc, pham duc
duc ban » duc tan, duc van, dua ban
su xac » pu xac, su cac
ve cam » ve cham, ve cac, va cam

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

• Performing a fuzzy search may retrieve terms with similar spellings: su xac kho tang ((mai hoi) or (xa hoi)). hieu ve cam duc ban thanh ((hai cua) or (hoi cua)) tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su xac kho tang ((mai hoi) OR (xa hoi)). hieu ve cam duc ban thanh ((hai cua) OR (hoi cua)) tre.
• Adding a wildcard symbol may retrieve word variants: su xac kho tang ((mai hoi) or (xa hoi)). hieu ve cam duc ban thanh ((hai cua) or (hoi cua)) tre*.