Perhaps you should try some spelling variations:
chieu tach » chiet tach, chiu trach, chieu tinh
chieu sach » chinh sach, chiet tach, chieu sang
thong cong » trong cong, tong cong, thong thong
anh tang » anh bang, anh dang, anh nang
va thong » va thuong, va phuong, he thong
cong van » cong vang, cong san, song van
van van » tan van, san van, van vat

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

• Performing a fuzzy search may retrieve terms with similar spellings: theo ((chieu tach) OR (chieu sach)) - ((anh tang) or (canh tranh)) va thong cong van van ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo ((chieu tach) OR (chieu sach)) - ((anh tang) OR (canh tranh)) va thong cong van van ban.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo ((chieu tach) OR (chieu sach)) - ((anh tang) or (canh tranh)) va thong cong van van ban".
• Adding a wildcard symbol may retrieve word variants: theo ((chieu tach) OR (chieu sach)) - ((anh tang) or (canh tranh)) va thong cong van van ban*.