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