Perhaps you should try some spelling variations:
hanh trinh » canh tranh, hanh chinh
cong tuong » cong thuong, cong truong, cong trong
trinh thi » trinh tai, dinh thi, trinh tu
hoc hieu » hoc thieu, hoc hien, hoc dieu
doc hieu » toc thieu, hoc thieu, hoc hien
thi cong » tai cong, thien cong
dan toan » dan than, manh toan, xuan toan
van toan » van tuan, van tan, van thanh

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

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