Perhaps you should try some spelling variations:
hanh trinh » hanh chinh
luan nhung » luan chung, luan hung, quan nhung
nhung cong » dung cong, thong cong, hang cong
lieu tinh » trieu tinh, diep tinh, bien tinh
van thanh » ban thanh, van tuan
doc lieu » duoc lieu, doc hieu, du lieu
van than » van thang, van tuan, van phan

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

• Performing a fuzzy search may retrieve terms with similar spellings: doc lieu tinh - ((hanh trinh) or (canh tranh)) luan nhung cong ((van than) OR (van thanh)) cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doc lieu tinh - ((hanh trinh) OR (canh tranh)) luan nhung cong ((van than) OR (van thanh)) cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doc lieu tinh - ((hanh trinh) or (canh tranh)) luan nhung cong ((van than) OR (van thanh)) cau".
• Adding a wildcard symbol may retrieve word variants: doc lieu tinh - ((hanh trinh) or (canh tranh)) luan nhung cong ((van than) OR (van thanh)) cau*.