Perhaps you should try some spelling variations:
thieu xanh » chieu xanh, hieu manh, thien anh
hanh tranh » canh tranh, hanh trinh, hanh trang
hoc thieu » toc thieu, hoc hien
tranh cua » doanh cua, manh cua
dung cong » dung trong
hang nong » thang long, han tong
hanh tu » anh tu, danh tu
han tu » phan tu, ban tu, van tu

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

• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thieu xanh - hanh tranh cua ((dung cong) OR (hang nong)) dan ((han tu) OR (hanh tu))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc thieu xanh - hanh tranh cua ((dung cong) or (hang nong)) dan ((han tu) OR (hanh tu))~".
• Adding a wildcard symbol may retrieve word variants: hoc thieu xanh - hanh tranh cua ((dung cong) or (hang nong)) dan ((han tu) OR (hanh tu))*.