Perhaps you should try some spelling variations:
thanh trung » thanh tung
hanh trang » canh tranh, hanh trinh, minh trang
thong danh » thong dan, trong danh, thong thanh
thong lanh » tuong lanh, thong thanh, thuong lang
hieu lang » chieu sang, hieu quang, nhieu tang
cua thong » cua thuong, cua khong, cua tong
doc hieu » toc thieu, hoc thieu, hoc hien
tuan ban » tuan bang, toan ban, luan ban

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

• Performing a fuzzy search may retrieve terms with similar spellings: doc hieu lang - ((hanh trang) or (thanh trung)) cua thong ((thong danh) OR (thong lanh)) tuan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doc hieu lang - ((hanh trang) OR (thanh trung)) cua thong ((thong danh) OR (thong lanh)) tuan ban.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doc hieu lang - ((hanh trang) or (thanh trung)) cua thong ((thong danh) OR (thong lanh)) tuan ban".
• Adding a wildcard symbol may retrieve word variants: doc hieu lang - ((hanh trang) or (thanh trung)) cua thong ((thong danh) OR (thong lanh)) tuan ban*.