Perhaps you should try some spelling variations:
thieu xanh » chieu xanh, hieu manh, thien anh
nhung cong » dung cong, thong cong, hang cong
trinh vat » trinh van, trinh luat, sinh vat
cong manh » cong danh, duong manh, cong thanh
manh toan » thanh toan, anh tuan, tinh toan
tien anh » tieng anh, tien manh, dien anh
trinh va » trinh van, trinh ve, trinh vi
toan cau » toan cao, toan ban, toan tap

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) or (tien anh)) - canh ((trinh va) OR (trinh vat)) nhung cong manh toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc ((thieu xanh) OR (tien anh)) - canh ((trinh va) OR (trinh vat)) nhung cong manh toan cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "toc ((thieu xanh) or (tien anh)) - canh ((trinh va) OR (trinh vat)) nhung cong manh toan cau".
• Adding a wildcard symbol may retrieve word variants: toc ((thieu xanh) or (tien anh)) - canh ((trinh va) OR (trinh vat)) nhung cong manh toan cau*.