Perhaps you should try some spelling variations:
truong phuong » truong chung, truong trung, dung phuong
nhung phuong » dung phuong, nhu phuong, bang phuong
thieu xanh » chieu xanh, hieu manh, thien anh
hanh tranh » canh tranh, hanh trinh, hanh trang
tranh cua » doanh cua, manh cua
toan cao » toan 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: toc thieu xanh - hanh tranh cua ((nhung phuong) OR (truong phuong)) dan ((toan cao) or (toan ban))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc thieu xanh - hanh tranh cua ((nhung phuong) OR (truong phuong)) dan ((toan cao) OR (toan ban)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "toc thieu xanh - hanh tranh cua ((nhung phuong) OR (truong phuong)) dan ((toan cao) or (toan ban))".
• Adding a wildcard symbol may retrieve word variants: toc thieu xanh - hanh tranh cua ((nhung phuong) OR (truong phuong)) dan ((toan cao) or (toan ban))*.