Perhaps you should try some spelling variations:
canh trinh » canh tranh, hanh trinh, canh tinh
theo chieu » theo tieu, ho chieu, thi chieu
thong cong » trong cong, tong cong, thong thong
theo chu » cho chu, chao chu, theo yeu
trinh ha » trinh han, trinh hoa, trinh nha
ha thong » hoa thong, nha thong, he thong
vat phan » va phan, sat phan, viet phan
van phan » van phong, van thanh, luan phan

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) or (theo chu)) sang - canh trinh ha thong cong ((vat phan) OR (van phan)) tu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((theo chieu) OR (theo chu)) sang - canh trinh ha thong cong ((vat phan) OR (van phan)) tu.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((theo chieu) or (theo chu)) sang - canh trinh ha thong cong ((vat phan) OR (van phan)) tu".
• Adding a wildcard symbol may retrieve word variants: ((theo chieu) or (theo chu)) sang - canh trinh ha thong cong ((vat phan) OR (van phan)) tu*.