Perhaps you should try some spelling variations:
chieu xanh » chieu sach, chieu sang, chieu tinh
cong vang » cong lang, cong quang, cong ngang
ho chieu » theo chieu, hoc thieu, doi chieu
khoan va » doan va, khoa ma, nhan va
cong van » cong san, song van, cong tan
thanh tu » hanh tu, nhanh tu, thanh tung
hoan va » hoang va, doan va, toan va

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

• If you are trying to use Boolean operators, they must be ALL CAPS: ho chieu xanh - doanh ((hoan va) OR (khoan va)) nhung ((cong van) OR (cong vang)) thanh tu~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho chieu xanh - doanh ((hoan va) or (khoan va)) nhung ((cong van) OR (cong vang)) thanh tu~".
• Adding a wildcard symbol may retrieve word variants: ho chieu xanh - doanh ((hoan va) or (khoan va)) nhung ((cong van) OR (cong vang)) thanh tu*.