Perhaps you should try some spelling variations:
thong cong » trong cong, tong cong, thong thong
chiet tach » chieu sach
hanh tang » hanh trang, anh tang, hanh mang
cua thong » cua thuong, cua khong, cua tong
cong vang » cong lang, cong quang, cong ngang
ho chiet » ho chieu, ho thiet, hoc thiet
vang van » dang van, tang van, lang van

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

• Performing a fuzzy search may retrieve terms with similar spellings: ho chiet tach - ((hanh tang) or (canh tranh)) cua thong cong vang van ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho chiet tach - ((hanh tang) OR (canh tranh)) cua thong cong vang van ban.
• Adding a wildcard symbol may retrieve word variants: ho chiet tach - ((hanh tang) or (canh tranh)) cua thong cong vang van ban*.