Perhaps you should try some spelling variations:
hanh trinh » canh tranh, hanh chinh
trinh quan » tinh quang, trinh luat, trinh han
doi chieu » doc hieu, doi chi, ho chieu
hoc thieu » toc thieu, hoc hien
quan lang » quan hoang, gian lang, quan luan
lang cong » dang cong, bang cong, hang cong
tac toan » tap toan, hach toan, tich toan
tam toan » tap toan, tam than, pham toan

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

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