Perhaps you should try some spelling variations:
thieu xanh » chieu xanh, hieu manh, thien anh
hanh trang » thanh trung, canh tranh, hanh trinh
nhung cong » thong cong, hang cong, nhung don
hoc thieu » toc thieu, hoc hien
trang cua » tranh cua, tang cua, trung cua
dung cong » dung trong
hang nong » thang long, han tong
bai toan » bai tap
toan ban » van ban

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 - hanh trang cua ((nhung cong) or (((dung cong) or (hang nong)))) bai toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thieu xanh - hanh trang cua ((nhung cong) OR (((dung cong) OR (hang nong)))) bai toan ban.
• Adding a wildcard symbol may retrieve word variants: hoc thieu xanh - hanh trang cua ((nhung cong) or (((dung cong) or (hang nong)))) bai toan ban*.