Perhaps you should try some spelling variations:
chieu tinh » lieu tinh, chau tinh, kieu tinh
thang cong » thanh cong, thang long, thong cong
hanh tran » hanh trang, thanh tran, hanh tram
van thang » van thanh, van khang, van hang
tran van » luan van
cong tac » cong ty
phan tap » han tap, pha tap, phan tu
phan lap » phan dau

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 tinh) OR (trieu tinh)) - hanh tran van thang cong tac ((phan tap) or (phan lap))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi ((chieu tinh) OR (trieu tinh)) - hanh tran van thang cong tac ((phan tap) OR (phan lap)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "doi ((chieu tinh) OR (trieu tinh)) - hanh tran van thang cong tac ((phan tap) or (phan lap))".
• Adding a wildcard symbol may retrieve word variants: doi ((chieu tinh) OR (trieu tinh)) - hanh tran van thang cong tac ((phan tap) or (phan lap))*.