Perhaps you should try some spelling variations:
chiet tach » chieu sach
hanh trinh » canh tranh, hanh chinh
doi chiet » doi chieu, doi chi, doi viet
van khang » van khanh, van thanh, van quang
cong vang » cong lang, cong quang, cong ngang
vang quan » van quan, nang quan, tang quan
van hang » van hoang, van thang, ban hang
quan ha » quan he

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

• Performing a fuzzy search may retrieve terms with similar spellings: doi chiet tach - hanh trinh ((van hang) or (van khang)) cong vang quan ha~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi chiet tach - hanh trinh ((van hang) OR (van khang)) cong vang quan ha*.