Perhaps you should try some spelling variations:
hieu nganh » vien nganh, hiem ngan, hieu manh
canh thanh » canh tranh, danh thanh, anh thanh
dung cung » dung chung, dung cong, dung dung
thanh va » thanh van, hanh va, thanh ha
dung ung » dung cong
toan cao » toan ban, toan tap
ho hieu » ho chieu, hoi hieu, nho hieu

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

• Performing a fuzzy search may retrieve terms with similar spellings: ho hieu nganh - canh thanh va ((dung cung) or (dung ung)) bai ((toan cao) or (van ban))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho hieu nganh - canh thanh va ((dung cung) OR (dung ung)) bai ((toan cao) OR (van ban)).
• Adding a wildcard symbol may retrieve word variants: ho hieu nganh - canh thanh va ((dung cung) or (dung ung)) bai ((toan cao) or (van ban))*.