Perhaps you should try some spelling variations:
chung thong » thong thong, hung thang, cong thong
hanh trinh » canh tranh, hanh chinh
thien hach » thien thanh, hien hanh
trinh luan » trinh luat, trinh quan, trinh han
chung hong » cheng hong, chun hong, khung hoang
kien sach » dien sach, vien bach, kien mac
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 ((kien sach) or (thien hach)) - hanh trinh luan ((chung hong) OR (chung thong)) van toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((kien sach) OR (thien hach)) - hanh trinh luan ((chung hong) OR (chung thong)) van toan ban*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((kien sach) or (thien hach)) - hanh trinh luan ((chung hong) OR (chung thong)) van toan ban*".