Perhaps you should try some spelling variations:
thien chanh » thien thanh, thien chinh, hien hanh
hanh trinh » canh tranh, hanh chinh
nhung cong » dung cong, thong cong, hang cong
trinh cua » tinh cua, trinh luat, trinh quan
cua nhung » va nhung
tien anh » tieng anh, tien manh, dien anh
cong van » cong vang, cong san, song van
van tuan » van quan, van ban, anh tuan
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: hoc ((tien anh) or (thien chanh)) - hanh trinh cua nhung cong van tuan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((tien anh) OR (thien chanh)) - hanh trinh cua nhung cong van tuan ban.
• Adding a wildcard symbol may retrieve word variants: hoc ((tien anh) or (thien chanh)) - hanh trinh cua nhung cong van tuan ban*.