Perhaps you should try some spelling variations:
chieu tinh » trieu tinh, lieu tinh, chau tinh
hanh trinh » canh tranh, hanh chinh
trinh phan » trinh han, trinh quan, thanh phan
toc chieu » toc thieu, doc hieu, hoc thieu
phan dung » phan ung, phan dang, chan dung
dung cong » dung trong
dan tocn » dan toan, dang toan, dan hoc

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

• Performing a fuzzy search may retrieve terms with similar spellings: toc chieu tinh - hanh trinh phan dung cong ((dan tocn) OR (dan toc)) bi~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "toc chieu tinh - hanh trinh phan dung cong ((dan tocn) OR (dan toc)) bi*".