Perhaps you should try some spelling variations:
tran thanh » ban thanh, van thanh, quan thanh
thanh tung » thanh cong
thong cong » trong cong, tong cong, thong thong
cua thong » cua thuong, cua khong, cua tong
hoc tran » hoc tan, hoc tren, boc tran
tung cua » trung cua, tuong cua, dung cua
cong dan » cong san, cong tan, huong dan
than cau » phan cau, than cap, thanh chau
toan cau » toan cao, toan ban, toan tap

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc tran thanh - thanh tung cua thong cong dan ((than cau) or (toan cau))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc tran thanh - thanh tung cua thong cong dan ((than cau) OR (toan cau)).
• Adding a wildcard symbol may retrieve word variants: hoc tran thanh - thanh tung cua thong cong dan ((than cau) or (toan cau))*.