Perhaps you should try some spelling variations:
thanh tung » thanh cong
hien hanh » dieu hanh
tong cong » trong cong, cong cong, dung cong
tien anh » tieng anh, tien manh, dien anh
cong tan » cong tac, cong san, cong thanh
tan toan » tan tran, tap toan, van toan
toan cao » toan ban, toan tap
ha tong » han tong, ha dong, ha tang

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) or (hien hanh)) - ((thanh trung) OR (thanh tung)) ha tong cong tan toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((tien anh) OR (hien hanh)) - ((thanh trung) OR (thanh tung)) ha tong cong tan toan cao.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((tien anh) or (hien hanh)) - ((thanh trung) OR (thanh tung)) ha tong cong tan toan cao".
• Adding a wildcard symbol may retrieve word variants: hoc ((tien anh) or (hien hanh)) - ((thanh trung) OR (thanh tung)) ha tong cong tan toan cao*.