Perhaps you should try some spelling variations:
hanh tranh » canh tranh, hanh trinh, hanh trang
thieu xanh » chieu xanh, hieu manh, thien anh
tranh cua » doanh cua, manh cua
cua trung » cua truong, xuan trung, cua nhung
tien anh » tieng anh, tien manh, dien anh
uong dan » huong dan, tuong dan, xuong dan
dan than » dan chan, ban than, van than
than tap » toan tap, han tap, phan tap

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)) - hanh tranh cua trung uong dan than tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((thieu xanh) OR (tien anh)) - hanh tranh cua trung uong dan than tap*.