Perhaps you should try some spelling variations:
nhung cong » dung cong, thong cong, hang cong
hieu manh » chieu xanh, hieu nganh, dieu hanh
thien anh » thien danh, tien anh, thien thanh
tranh va » tranh van, trang va, trinh va
cong dan » cong san, cong tan, huong dan
dan toan » van toan, dan than, manh toan
toan tap » toan ban

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc ((hieu manh) or (thien anh)) - canh tranh va nhung cong dan toan tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((hieu manh) OR (thien anh)) - canh tranh va nhung cong dan toan tap.
• Adding a wildcard symbol may retrieve word variants: hoc ((hieu manh) or (thien anh)) - canh tranh va nhung cong dan toan tap*.