Perhaps you should try some spelling variations:
hanh trinh » canh tranh, hanh chinh
doi chiet » doi chieu, doi viet, doi chinh
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
doi chi » doi khi
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) OR (doi chi)) tach - hanh trinh van ((bang cong) or (dang cong)) nang quan ha~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((doi chiet) OR (doi chi)) 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) OR (doi chi)) tach - hanh trinh van ((bang cong) or (dang cong)) nang quan ha*".