Perhaps you should try some spelling variations:
"ve am thuc thuc hanh khong _ trung" » "ve am thuc thuc hang khong _ trung", "ve am thuc thuc xanh khong _ trung", "ve am thuc thuc khanh phong _ trung", "ve am hoc thuc hanh khong _ trung", "va am thuc thuc hanh khong _ trung"
"te cac thu thuc cac phuong he thong" » "te cac thu thuc cac truong he thong", "te cac thu thuc cac phuong te thong", "te cac thu thuc cac phuong de thong", "te cac thu thuc cac phuong ke thong", "te cac thu thuoc cac phuong he thong", "te cac thue thuc cac phuong he thong", "te cac thu tuc cac phuong he thong", "te cac thu thuc cach phuong he thong", "te cac thu phuc cac phuong he thong", "te cach thuc thuc cac phuong he thong", "te cac thoi thuc cac phuong he thong", "tu cac thu thuc cac phuong he thong", "ve cac thu thuc cac phuong he thong", "te cao thu thuc cac phuong he thong", "te cac thu thuc cac phuong he trong"

Try widening your search to All Fields.

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

• Performing a fuzzy search may retrieve terms with similar spellings: (("ve am thuc thuc hanh khong _ trung") or ("te cac thu thuc cac phuong he thong"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("ve am thuc thuc hanh khong _ trung") OR ("te cac thu thuc cac phuong he thong")).
• Removing quotes may allow a broader search: (( ve am thuc thuc hanh khong _ trung ) or ( te cac thu thuc cac phuong he thong )).
• Adding a wildcard symbol may retrieve word variants: (("ve am thuc thuc hanh khong _ trung") or ("te cac thu thuc cac phuong he thong"))*.