Perhaps you should try some spelling variations:
cong cong » cong dong, trong cong, dung cong
tap thuc » tap tuc, tam thuc, toan thuc
thuc nha » thuc nhan, thuc ha, thuy nha
ban van » ban dan, ban va, tan van
van ty » van ky, van tu, van te
ty tai » ly tai, tu tai, te tai
tuyen » truyen, quyen

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

• Performing a fuzzy search may retrieve terms with similar spellings: tuyen tap thuc nha đe co ban van ty tai ((cong cong) or (cong (dong OR dung)))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tuyen tap thuc nha đe co ban van ty tai ((cong cong) OR (cong (dong OR dung))).
• The words AND, OR and NOT may confuse the search; try adding quotes: "tuyen tap thuc nha đe co ban van ty tai ((cong cong) or (cong (dong OR dung)))".
• Adding a wildcard symbol may retrieve word variants: tuyen tap thuc nha đe co ban van ty tai ((cong cong) or (cong (dong OR dung)))*.