Perhaps you should try some spelling variations:
khong cong » thong cong, khong cang, chong cong
chieu xanh » chieu sach, chieu sang, chieu tinh
hien xanh » hien hanh, hien nhanh, hien khanh
hanh hang » thanh hang, hang hang, hanh han
ha khong » hoa khong, hay khong, hua khong
cong tan » cong tac, cong san, cong thanh
tan toan » tan tran, tap toan, van toan
toan ban » van ban
hang ha » hang hoa, hang hai, hoang ha

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc ((hien xanh) or (chieu xanh)) - hanh hang ha khong cong tan toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((hien xanh) OR (chieu xanh)) - hanh hang ha khong cong tan toan ban.
• Adding a wildcard symbol may retrieve word variants: hoc ((hien xanh) or (chieu xanh)) - hanh hang ha khong cong tan toan ban*.