Perhaps you should try some spelling variations:
thien thanh » tien thanh, thi thanh, hien hanh
thieu xanh » chieu xanh, hieu manh, thien anh
nhung hang » nhung lang, nhung bang, nhung cang
doanh cua » doanh luan
toan cau » toan cao, toan ban, toan tap
sinh va » sinh vat, tinh va, dinh van
va toan » van toan, bai toan, tap toan

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 (thien thanh)) - hanh ((sinh va) or (doanh cua)) nhung hang va toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((thieu xanh) OR (thien thanh)) - hanh ((sinh va) OR (doanh cua)) nhung hang va toan cau.
• Adding a wildcard symbol may retrieve word variants: hoc ((thieu xanh) or (thien thanh)) - hanh ((sinh va) or (doanh cua)) nhung hang va toan cau*.