Perhaps you should try some spelling variations:
phong thuyen » phong tuyen, khong chuyen, phong thuy
kinh phong » dinh phong, minh phong, sinh phong
thuc bach » truc bach, thuoc sach, thuc hanh
thuc cach » thuoc sach, truoc cach, thuc hanh
khoa phan » hoa phan, khoa than, khoa phau
phan cong » thanh cong
tu sach » thu sach, su sach, te sach
cong te » cong ty, cong ti, cong tu
te dinh » le dinh, te danh, ve dinh

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu sach kinh phong thuyen đe ky thuat: kien ((thuc bach) OR (thuc cach)) khoa phan cong te dinh~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach kinh phong thuyen đe ky thuat: kien ((thuc bach) OR (thuc cach)) khoa phan cong te dinh".
• Adding a wildcard symbol may retrieve word variants: tu sach kinh phong thuyen đe ky thuat: kien ((thuc bach) OR (thuc cach)) khoa phan cong te dinh*.