Perhaps you should try some spelling variations:
chieu xanh » chieu sach, chieu sang, chieu tinh
nhanh tinh » nhanh thanh, hanh trinh, nhan sinh
cong quang » luong quang, thong quang, duong quang
hien xanh » hien hanh, hien nhanh, hien khanh
cua nhung » va nhung
cong lang » cong vang, cong luong, cong ngang
tinh cua » trinh cua, sinh cua, tinh chat
tuan cao » toan cao, juan cao, quang cao

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)) - nhanh tinh cua nhung ((cong quang) or (cong lang)) tuan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((hien xanh) OR (chieu xanh)) - nhanh tinh cua nhung ((cong quang) OR (cong lang)) tuan cao.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((hien xanh) OR (chieu xanh)) - nhanh tinh cua nhung ((cong quang) or (cong lang)) tuan cao".
• Adding a wildcard symbol may retrieve word variants: hoc ((hien xanh) OR (chieu xanh)) - nhanh tinh cua nhung ((cong quang) or (cong lang)) tuan cao*.