Perhaps you should try some spelling variations:
theo chieu » theo tieu, ho chieu, theo chu
chieu sach » chinh sach, chiet tach, chieu sang
tranh chua » tranh cua, trinh chuan, tranh chap
cong thong » cong thuong, cong trong, dong thong
chua xang » chua nang, chuc nang, chu bang
cong hang » cong thang, cong hung, cong lang

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 sach - canh tranh chua xang ((cong hang) or (cong thong)) hang va~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo chieu sach - canh tranh chua xang ((cong hang) OR (cong thong)) hang va.
• Adding a wildcard symbol may retrieve word variants: theo chieu sach - canh tranh chua xang ((cong hang) or (cong thong)) hang va*.