Perhaps you should try some spelling variations:
luan thang » luan thanh, xuan thang, luan tang
thang long » thanh cong
phap sinh » phau sinh, phai sinh, phap tinh
phap tang » phap nang, phap tieng
doanh han » doanh nhan, doanh hoan, doanh phan
han luan » hang luan, nhan luan, dan luan
long van » luong van, song van, lang van
van van » tan van, san van, van vat

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 sinh) or (phap tang)) - doanh han luan thang long van van ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo ((phap sinh) OR (phap tang)) - doanh han luan thang long van van ban.
• Adding a wildcard symbol may retrieve word variants: theo ((phap sinh) or (phap tang)) - doanh han luan thang long van van ban*.