Perhaps you should try some spelling variations:
"te sach trinh pham thi đong luc" » "te sach tranh pham thi đong luc", "te hanh trinh pham thi đong luc", "te sach kinh pham thi đong luc", "te sach trinh phan thi đong luc", "te sach trinh phap thi đong luc", "te sach trinh cham thi đong luc", "toc sach trinh pham thi đong luc"
"tu cach sinh hat doi đong luc" » "tu cach kinh hat doi đong luc", "tu sach kinh hat doi đong luc", "tu cac tinh hat doi đong luc", "tu cach sinh hoat doi đong luc", "tu cach sinh vat doi đong luc", "tu cach sinh thai doi đong luc", "tu cac sinh hat doi đong luc", "tu cach sinh thay doi đong luc", "tu cach sinh hang doi đong luc"

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: (("te sach trinh pham thi đong luc") or ("tu cach sinh hat doi đong luc"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("te sach trinh pham thi đong luc") OR ("tu cach sinh hat doi đong luc")).
• Removing quotes may allow a broader search: (( te sach trinh pham thi đong luc ) or ( tu cach sinh hat doi đong luc )).
• Adding a wildcard symbol may retrieve word variants: (("te sach trinh pham thi đong luc") or ("tu cach sinh hat doi đong luc"))*.