Perhaps you should try some spelling variations:
vu thanh » su thanh, vu khanh, cuu thanh
thanh ve » hanh ve, thanh va, thanh vien
thanh ky » hanh ky, than ky, thanh tay
va thanh » gia thanh, ban thanh, va tinh
ky dinh » ky sinh, ky danh, ky kinh
dinh va » dinh van, dinh ve, tinh va
cua tre » cua te, cuu tre, cua triet
cua tu » cua tuc, cua su, cua cu
luc va » duc va, tuc va, loc va
va hoi » xa hoi, va hoc, va hoa

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

• Performing a fuzzy search may retrieve terms with similar spellings: vu thanh ky dinh va hoi. hieu ((van lam) OR (van nam)) luc va thanh ve ((cua tre) or (cua tu))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu thanh ky dinh va hoi. hieu ((van lam) OR (van nam)) luc va thanh ve ((cua tre) OR (cua tu))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "vu thanh ky dinh va hoi. hieu ((van lam) OR (van nam)) luc va thanh ve ((cua tre) or (cua tu))*".