Perhaps you should try some spelling variations:
doanh doanh » toan doanh, doanh hoan, doanh thanh
doanh luan » doanh nhan
luan thang » luan thanh, xuan thang, luan tang
thang lang » thang long, thuong lang, nhanh lang
phap tinh » phap sinh, phap tieng, tap tinh
phap tang » phap nang, phap tieng
lang van » dang van, tang van, hoang van
ban cao » bao cao, ban can, ban co

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

• Performing a fuzzy search may retrieve terms with similar spellings: theo ((phap tinh) or (phap tang)) - doanh doanh luan thang lang van ban cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo ((phap tinh) OR (phap tang)) - doanh doanh luan thang lang van ban cao.
• Adding a wildcard symbol may retrieve word variants: theo ((phap tinh) or (phap tang)) - doanh doanh luan thang lang van ban cao*.