Perhaps you should try some spelling variations:
dung cong » dung trong
tien anh » tieng anh, tien manh, dien anh
hanh han » hanh nhan, hanh phan, hanh san
cua dung » cua dang, cua dong, qua dung
cong san » cong tac
toan cao » toan tap
toan ban » van ban
han cua » hang cua, nhan cua, than cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: theo ((tien anh) or (dieu hanh)) - hanh han cua dung cong san ((toan cao) OR (toan ban))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo ((tien anh) OR (dieu hanh)) - hanh han cua dung cong san ((toan cao) OR (toan ban)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo ((tien anh) or (dieu hanh)) - hanh han cua dung cong san ((toan cao) OR (toan ban))".
• Adding a wildcard symbol may retrieve word variants: theo ((tien anh) or (dieu hanh)) - hanh han cua dung cong san ((toan cao) OR (toan ban))*.