Perhaps you should try some spelling variations:
hanh tran » hanh trang, thanh tran, thanh trang
hanh tram » hanh tam, hanh trang, thanh tran
dung cong » dung trong
hoc tien » hoc tieng, hoc hien, hoc vien
tien anh » tieng anh, tien manh, dien anh
van dung » van dong, xay dung, tin dung
cong tan » cong tac, cong san, cong thanh
van cau » van hau, van chat, toan cau
van dau » van dao, phan dau

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc tien anh - ((hanh tran) or (hanh tram)) van dung cong tan ((van cau) or (van dau))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc tien anh - ((hanh tran) OR (hanh tram)) van dung cong tan ((van cau) OR (van dau)).
• Adding a wildcard symbol may retrieve word variants: hoc tien anh - ((hanh tran) or (hanh tram)) van dung cong tan ((van cau) or (van dau))*.