Perhaps you should try some spelling variations:
thanh dai » thanh hai, thanh tai, thanh dat
ban thanh » ban hanh, ban hang
cua viet » ca viet, hoa viet, cua vat
ky tang » ky nang, ky dang, kho tang
mai hoi » mai khoi, dai hoi, lai hoi
hieu ve » hieu va, hieu van
cam duc » cam xuc, cao duc, pham duc
duc ban » duc tan, duc van, dua ban
su cac » tu cac, su cao, su can
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 cac ky tang ((mai hoi) or (xa hoi)). hieu ve cam duc ban thanh dai cua viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su cac ky tang ((mai hoi) OR (xa hoi)). hieu ve cam duc ban thanh dai cua viet.
• Adding a wildcard symbol may retrieve word variants: su cac ky tang ((mai hoi) or (xa hoi)). hieu ve cam duc ban thanh dai cua viet*.