Perhaps you should try some spelling variations:
chieu xanh » chieu sach, chieu sang, chieu tinh
hieu manh » hieu nganh, dieu hanh, hien hanh
dung cong » dung trong
trang va » tran van, hang va
cong van » cong vang, cong san, song van
van chat » cao chat
hanh va » hang va, hanh vi
chat tu » nhat tu, chai tu, chay tu

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

• Performing a fuzzy search may retrieve terms with similar spellings: theo ((hieu manh) or (chieu xanh)) - canh ((hanh va) or (trang va)) dung cong van chat tu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo ((hieu manh) OR (chieu xanh)) - canh ((hanh va) OR (trang va)) dung cong van chat tu.
• Adding a wildcard symbol may retrieve word variants: theo ((hieu manh) or (chieu xanh)) - canh ((hanh va) or (trang va)) dung cong van chat tu*.