Perhaps you should try some spelling variations:
thieu tinh » trieu tinh, chieu tinh, thien tinh
khien tinh » thien tinh, khien thich, bien tinh
hanh trinh » canh tranh, hanh chinh
trinh luan » trinh luat, trinh quan, trinh han
luan phung » luan phuong, luan chung, luan phong
phung cong » nhung cong, phong cong, nhung chong
cong van » cong vang, cong san, song van
van toan » van tuan, van tan, van thanh
toan ban » van 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 ((thieu tinh) or (khien tinh)) - hanh trinh luan phung cong van toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((thieu tinh) OR (khien tinh)) - hanh trinh luan phung cong van toan ban.
• Adding a wildcard symbol may retrieve word variants: hoc ((thieu tinh) or (khien tinh)) - hanh trinh luan phung cong van toan ban*.