Perhaps you should try some spelling variations:
hieu nganh » vien nganh, hiem ngan, hieu manh
hieu lang » chieu sang, hieu quang, nhieu tang
manh hung » anh huong
bang cong » dang cong, bang song, hang cong
hung cua » huong cua, chung cua, khung cua
cua bang » chua bang, cua ban, cua dang
cong van » cong vang, cong san, song van
toan cao » toan tap
toan ban » van ban

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

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