Perhaps you should try some spelling variations:
chieu sang » chieu sach, chieu xanh, hieu lang
thong cong » trong cong, tong cong, thong thong
hieu manh » chieu xanh, hieu nganh, dieu hanh
thanh tra » thanh toan, thanh hoa
van thong » van thuong, van phong, va thong
trinh han » trinh quan
tra van » tran van, ta van, trang van
han tap » han tai, toan tap, nhan tai

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc ((chieu sang) or (hieu manh)) - thanh tra van thong cong trinh han tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((chieu sang) OR (hieu manh)) - thanh tra van thong cong trinh han tap.
• Adding a wildcard symbol may retrieve word variants: hoc ((chieu sang) or (hieu manh)) - thanh tra van thong cong trinh han tap*.