Perhaps you should try some spelling variations:
chieu xanh » chieu sach, chieu sang, chieu tinh
thong cong » trong cong, tong cong, thong thong
nhan dang » phan dang, tran dang
nhan dan » phan dau, gian dan, nhan tai
va thong » va thuong, va phuong, he thong
cong van » cong vang, cong san, song van
van quan » van ban
quan cau » quang cao, toan cau, quan ha

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

• Performing a fuzzy search may retrieve terms with similar spellings: theo ((chieu xanh) or (hieu qua)) - ((nhan dang) or (nhan dan)) va thong cong van quan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo ((chieu xanh) OR (hieu qua)) - ((nhan dang) OR (nhan dan)) va thong cong van quan cau.
• Adding a wildcard symbol may retrieve word variants: theo ((chieu xanh) or (hieu qua)) - ((nhan dang) or (nhan dan)) va thong cong van quan cau*.