Perhaps you should try some spelling variations:
tcanh tranh » thanh thanh, lanh tranh, thanh tran
chieu sach » chinh sach, chiet tach, chieu sang
nhung cong » dung cong, thong cong, hang cong
can tranh » tan tran, van ranh, co tranh
ho chieu » theo chieu, hoc thieu, doi chieu
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: ho chieu sach - ((((tcanh tranh) OR (can tranh))) or (canh tranh)) va nhung cong van toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho chieu sach - ((((tcanh tranh) OR (can tranh))) OR (canh tranh)) va nhung cong van toan ban.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho chieu sach - ((((tcanh tranh) OR (can tranh))) or (canh tranh)) va nhung cong van toan ban".
• Adding a wildcard symbol may retrieve word variants: ho chieu sach - ((((tcanh tranh) OR (can tranh))) or (canh tranh)) va nhung cong van toan ban*.