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
trinh van » trinh han, trinh quan, trinh toan
bang cong » bang song, hang cong, dung cong
dang cong » dung cong
nang quan » ban quan, nang suat
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 ((bang cong) OR (dang cong)) nang quan ha~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doi chiet tach - hanh trinh van ((bang cong) OR (dang cong)) nang quan ha*".