Perhaps you should try some spelling variations:
chieu xanh » chieu sach, chieu sang, chieu tinh
hang cong » hang nong, bang cong, thanh cong
dang cong » dung cong
ho chieu » theo chieu, hoc thieu, doi chieu
chinh va » chinh tai, hanh va, tinh va
chinh ta » chinh tai, chinh tri
toan cau » toan cao, toan ban, toan tap

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 ((chinh va) OR (chinh ta)) ((hang cong) or (dang cong)) tinh toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho chieu xanh - hanh ((chinh va) OR (chinh ta)) ((hang cong) OR (dang cong)) tinh toan cau*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho chieu xanh - hanh ((chinh va) OR (chinh ta)) ((hang cong) or (dang cong)) tinh toan cau*".