Perhaps you should try some spelling variations:
thieu xanh » chieu xanh, thien anh, thien danh
canh trinh » canh tranh, hanh trinh, canh tinh
nhung cong » dung cong, thong cong, hang cong
hieu manh » chieu xanh, hieu nganh, dieu hanh
tien anh » tieng anh, tien manh, dien anh
trinh ve » trinh he, trinh va, trinh vi
ve nhung » va nhung, tu nhung
cong san » cong tac
san chan » san chang, dan chan, san chay
chan cau » phan cau, can cau, chinh cau

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 xanh) or (tien anh))) or (hieu manh)) - canh trinh ve nhung cong san chan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((((thieu xanh) OR (tien anh))) OR (hieu manh)) - canh trinh ve nhung cong san chan cau.
• Adding a wildcard symbol may retrieve word variants: hoc ((((thieu xanh) or (tien anh))) or (hieu manh)) - canh trinh ve nhung cong san chan cau*.