Perhaps you should try some spelling variations:
trang tuan » tran tuan, trung tuan, tran xuan
trong tuan » trong quan, trung tuan, trong tan
doan phong » doan phuong, dan phong, van phong
hieu lang » chieu sang, hieu quang, nhieu tang
phong van » phung van, thong van, phong va
doi hieu » doi chieu, doc hieu, doi hien
ban thi » dan thi, van thi, can thi

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

• Performing a fuzzy search may retrieve terms with similar spellings: doi hieu lang - hanh ((trang tuan) or (trong tuan)) doan phong van ban thi~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi hieu lang - hanh ((trang tuan) OR (trong tuan)) doan phong van ban thi.
• Adding a wildcard symbol may retrieve word variants: doi hieu lang - hanh ((trang tuan) or (trong tuan)) doan phong van ban thi*.