Perhaps you should try some spelling variations:
thieu xanh » chieu xanh, hieu manh, thien anh
canh trinh » canh tranh, hanh trinh, canh tinh
dung cong » dung trong
trinh su » trinh tu, trinh san, trinh cau
cong dan » cong san, cong tan, huong dan
than cap » khan cap, thanh lap, thanh cac
phan cau » phan dau, phan cac, phan tu

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

• Performing a fuzzy search may retrieve terms with similar spellings: toc thieu xanh - canh trinh su dung cong dan ((than cap) or (phan cau))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc thieu xanh - canh trinh su dung cong dan ((than cap) OR (phan cau)).
• Adding a wildcard symbol may retrieve word variants: toc thieu xanh - canh trinh su dung cong dan ((than cap) or (phan cau))*.