Perhaps you should try some spelling variations:
thieu tinh » trieu tinh, thien tinh, lieu tinh
chieu tinh » trieu tinh, lieu tinh, chau tinh
hanh trinh » canh tranh, hanh chinh
nhung cong » dung cong, thong cong, nhung don
trinh thi » trinh tai, dinh thi, trinh tu
hang cong » dang cong, hang nong, bang cong
dan thanh » dang thanh, danh thanh, ban thanh
thanh lap » thanh san, phan lap, thanh hai

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc ((thieu tinh) OR (chieu tinh)) - hanh trinh thi ((nhung cong) or (hang cong)) dan thanh lap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((thieu tinh) OR (chieu tinh)) - hanh trinh thi ((nhung cong) OR (hang cong)) dan thanh lap*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((thieu tinh) OR (chieu tinh)) - hanh trinh thi ((nhung cong) or (hang cong)) dan thanh lap*".