Perhaps you should try some spelling variations:
"ve am hoc thuc hanh khong _ trung" » "ve am hoc thuc hang khong _ trung", "ve am hoc thuc xanh khong _ trung", "ve am hoc thuc khanh phong _ trung", "ve am hoc huu hanh khong _ trung", "ve ad hoc thuc hanh khong _ trung", "va am hoc 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 thuc thuc cac phuong he thong", "te cac thu thuoc cac phuong he thong", "te cac thue thuc cac phuong he thong", "te cac thu thuc cach phuong he thong", "te cac thu tuc cac 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 hoc 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 hoc thuc hanh khong _ trung") OR ("te cac thu thuc cac phuong he thong")).
• Removing quotes may allow a broader search: (( ve am hoc thuc hanh khong _ trung ) or ( te cac thu thuc cac phuong he thong )).
• Adding a wildcard symbol may retrieve word variants: (("ve am hoc thuc hanh khong _ trung") or ("te cac thu thuc cac phuong he thong"))*.