Perhaps you should try some spelling variations:
nhanh dinh » nhanh tinh, hanh dinh, nhan dinh
luan chung » luan chinh
hieu lang » chieu sang, hieu quang, nhieu tang
cuu nhung » cua nhung, cuu phuong, chua nhung
chong van » thong van, hong van, phong van
hoc hieu » hoc thieu, hoc hien, doc hieu
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: hoc hieu lang - nhanh dinh ((cuu nhung) or (luan chung)) chong van van ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc hieu lang - nhanh dinh ((cuu nhung) OR (luan chung)) chong van van ban.
• Adding a wildcard symbol may retrieve word variants: hoc hieu lang - nhanh dinh ((cuu nhung) or (luan chung)) chong van van ban*.