Perhaps you should try some spelling variations:
chieu xanh » chieu sach, chieu sang, chieu tinh
trinh toan » tinh toan, thanh toan, trinh han
trinh vat » trinh luat, sinh vat, trinh han
trinh van » trinh han, trinh quan, dinh van
bang cong » dang cong, bang song, hang cong
ho chieu » theo chieu, hoc thieu, doi chieu
cong tap » cuong tap, cong tac, cong tan
tap toan » tap doan, tap quan, bai toan
toan ban » van ban

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

• Performing a fuzzy search may retrieve terms with similar spellings: ho chieu xanh - hanh ((trinh vat) or (((trinh van) OR (trinh toan)))) bang cong tap toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho chieu xanh - hanh ((trinh vat) OR (((trinh van) OR (trinh toan)))) bang cong tap toan ban.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho chieu xanh - hanh ((trinh vat) or (((trinh van) OR (trinh toan)))) bang cong tap toan ban".
• Adding a wildcard symbol may retrieve word variants: ho chieu xanh - hanh ((trinh vat) or (((trinh van) OR (trinh toan)))) bang cong tap toan ban*.