Perhaps you should try some spelling variations:
chieu tinh » trieu tinh, lieu tinh, chau tinh
hanh trinh » hanh chinh
hoc chieu » hoc thieu, ho chieu, hoc hien
quan dung » quang dung, quan duong, quan dong
trong tan » trong quan, trong cac, trong ca
qua dung » quang dung, su dung, qua song
tan van » tran van, tang van, luan van

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 tinh - ((hanh trinh) OR (canh tranh)) ((quan dung) or (qua dung)) trong tan van ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc chieu tinh - ((hanh trinh) OR (canh tranh)) ((quan dung) OR (qua dung)) trong tan van ban.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc chieu tinh - ((hanh trinh) OR (canh tranh)) ((quan dung) or (qua dung)) trong tan van ban".
• Adding a wildcard symbol may retrieve word variants: hoc chieu tinh - ((hanh trinh) OR (canh tranh)) ((quan dung) or (qua dung)) trong tan van ban*.