Perhaps you should try some spelling variations:
theo chieu » theo tieu, ho chieu, theo chu
chieu sang » chieu sach, chieu xanh, hieu lang
tranh cua » doanh cua, manh cua
khoan cau » khoan cam, khoan dau, khoai chau
cua dang » cua cong, cua ban
cong may » cong xay, cong ma, cong my
cong hay » cong ha, cong xay, cong hai

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 sang - canh tranh cua dang ((cong may) or (cong hay)) khoan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo chieu sang - canh tranh cua dang ((cong may) OR (cong hay)) khoan cau.
• Adding a wildcard symbol may retrieve word variants: theo chieu sang - canh tranh cua dang ((cong may) or (cong hay)) khoan cau*.