Perhaps you should try some spelling variations:
tan thanh » tran thanh, tang thanh, toan thanh
thanh hai » thanh phan, thanh hoa, thanh san
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
su cac » tu cac, su cao, su can
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 cac ky tang ((ma hoi) or (xa hoi)). hieu ve cam duc tan thanh hai ((cua triet) or (cua viet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su cac ky tang ((ma hoi) OR (xa hoi)). hieu ve cam duc tan thanh hai ((cua triet) OR (cua viet)).
• Adding a wildcard symbol may retrieve word variants: su cac ky tang ((ma hoi) or (xa hoi)). hieu ve cam duc tan thanh hai ((cua triet) or (cua viet))*.