Perhaps you should try some spelling variations:
thanh tri » thanh tra, thanh tai, chinh tri
tan thanh » tran thanh, tang thanh, toan thanh
cua tre » cua te, cuu tre, cua triet
mai hoi » mai khoi, dai hoi, lai hoi
cac duc » cac du, cao duc, cac dac
ky tang » ky nang, ky dang, kho tang
hieu ve » hieu va, hieu van
ve cac » va cac, vien cac
su cac » tu cac, su cao, su can
me hoi » le hoi
su xac » pu xac

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) or (su xac)) ky tang ((me hoi) or (mai hoi)). hieu ve cac duc tan thanh tri cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((su cac) OR (su xac)) ky tang ((me hoi) OR (mai hoi)). hieu ve cac duc tan thanh tri cua tre.
• Adding a wildcard symbol may retrieve word variants: ((su cac) or (su xac)) ky tang ((me hoi) or (mai hoi)). hieu ve cac duc tan thanh tri cua tre*.