Perhaps you should try some spelling variations:
thanh trinh » hanh trinh, thanh tinh, thanh binh
thanh tri » thanh tra, thanh tai, chinh tri
hieu van » hieu va, thien van, lieu va
cua tre » cua te, cuu tre, cua triet
duc van » duc va, duc tan, duc manh
van cam » van nam, van lam, van cau
cam duc » cam xuc, cao duc, pham duc
dang xa » dang xay, lang xa, dang ha
sac ky » cac ky

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

• Performing a fuzzy search may retrieve terms with similar spellings: su ((sai ky) OR (sac ky)) dang xa hoi. hieu van cam duc van ((thanh tri) or (thanh trinh)) cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su ((sai ky) OR (sac ky)) dang xa hoi. hieu van cam duc van ((thanh tri) OR (thanh trinh)) cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su ((sai ky) OR (sac ky)) dang xa hoi. hieu van cam duc van ((thanh tri) or (thanh trinh)) cua tre".
• Adding a wildcard symbol may retrieve word variants: su ((sai ky) OR (sac ky)) dang xa hoi. hieu van cam duc van ((thanh tri) or (thanh trinh)) cua tre*.