Perhaps you should try some spelling variations:
hieu nganh » hiem ngan, hieu manh, nghiep nganh
vien nganh » vien thanh
thanh dung » thanh duong, thanh tung, thanh hung
luan thong » luan phong, luan tuong, luat thong
thong cong » trong cong, tong cong, thong thong
cong dan » cong san, cong tan, huong dan
dan chan » dan gian, dan ca, van chat
chan cau » phan cau, can cau, chinh cau

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

• Performing a fuzzy search may retrieve terms with similar spellings: doc ((hieu nganh) OR (vien nganh)) - thanh dung luan thong cong dan chan cau~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doc ((hieu nganh) OR (vien nganh)) - thanh dung luan thong cong dan chan cau".
• Adding a wildcard symbol may retrieve word variants: doc ((hieu nganh) OR (vien nganh)) - thanh dung luan thong cong dan chan cau*.