Perhaps you should try some spelling variations:
chieu sang » chieu sach, hieu lang, nhieu tang
chieu xanh » chieu sach, chieu tinh, hieu manh
hanh thong » anh thong, hanh trong, hang thong
thong cong » trong cong, tong cong, thong thong
thanh van » thanh san, thanh toan, thanh phan
trinh han » trinh quan
van hanh » van thanh, ban hanh, van anh
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 (chieu xanh)) - thanh van hanh thong cong trinh han tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((chieu sang) OR (chieu xanh)) - thanh van hanh thong cong trinh han tap.
• Adding a wildcard symbol may retrieve word variants: hoc ((chieu sang) or (chieu xanh)) - thanh van hanh thong cong trinh han tap*.