Perhaps you should try some spelling variations:
hanh trinh » canh tranh, hanh chinh
hoc chieu » ho chieu, hoc hien, hoc dieu
hoc thieu » toc thieu, hoc hien
hang cong » dang cong, hang nong, bang cong
trinh va » trinh van, trinh vat, trinh ve
dan than » dan chan, ban than, van than
than man » than ma, thanh san, tran manh

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((hoc chieu) or (hoc thieu)) tinh - hanh trinh va ((hang cong) or (trong cong)) dan than man~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((hoc chieu) OR (hoc thieu)) tinh - hanh trinh va ((hang cong) OR (trong cong)) dan than man.
• Adding a wildcard symbol may retrieve word variants: ((hoc chieu) or (hoc thieu)) tinh - hanh trinh va ((hang cong) or (trong cong)) dan than man*.