Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
hoang manh » hoang minh, hoang anh, hoang thanh
hoang xanh » hoang anh, hoang van, hoang minh
ho chieu » theo chieu, hoc thieu, doi chieu
cong tac » cong ty
tac toan » tap toan, tam toan, hach toan
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 sach - ((hoang manh) OR (hoang xanh)) ((cua nhung) or (va nhung)) cong tac toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho chieu sach - ((hoang manh) OR (hoang xanh)) ((cua nhung) OR (va nhung)) cong tac toan cao.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho chieu sach - ((hoang manh) OR (hoang xanh)) ((cua nhung) or (va nhung)) cong tac toan cao".
• Adding a wildcard symbol may retrieve word variants: ho chieu sach - ((hoang manh) OR (hoang xanh)) ((cua nhung) or (va nhung)) cong tac toan cao*.