Perhaps you should try some spelling variations:
cong ngang » cong nhan, cong quang, cong lang
ngang manh » ngan danh, hoang manh, nhung manh
hanh tram » hanh tam, hanh trang, thanh tran
van thong » van thuong, van phong, van thang
doc hieu » toc thieu, hoc thieu, hoc hien
thi hien » thi lien, thi huyen, thi hue
va thong » va thuong, va phuong, he thong
manh cau » danh cau, manh cam, minh 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) or (thi hien)) xanh - hanh tram ((van thong) or (va thong)) cong ngang manh cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((doc hieu) OR (thi hien)) xanh - hanh tram ((van thong) OR (va thong)) cong ngang manh cau.
• Adding a wildcard symbol may retrieve word variants: ((doc hieu) or (thi hien)) xanh - hanh tram ((van thong) or (va thong)) cong ngang manh cau*.