Perhaps you should try some spelling variations:
tuyen phap » truyen phap, thuyet phap, truyen phan
phap cach » phap cac, nhan cach, phan cac
cach thuc » anh thuc, cac thu
dung cong » dung trong
tai dung » trai dung, thi dung, mai dung
vat y » vat ly, vat _
va y » va ky, va my, va ly

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

• Performing a fuzzy search may retrieve terms with similar spellings: tuyen phap cach thuc đe co ban ((va y) or (vat y)) tai dung cong~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tuyen phap cach thuc đe co ban ((va y) OR (vat y)) tai dung cong.
• Adding a wildcard symbol may retrieve word variants: tuyen phap cach thuc đe co ban ((va y) or (vat y)) tai dung cong*.