Perhaps you should try some spelling variations:
xay thanh » day thanh, giay thanh, ngay thanh
thuc xay » thuc day, tuc xay, thuat xay
su sach » vu sach
so sach » so sanh, bo sach, co sach
ty nang » ky nang, ty hang, ly nang
hieu ve » hieu va, hieu van
ca tren » cau tren, cu tren, la tren
san ca » san cua, sanh ca, dan ca
ve am » va am

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((su sach) or (so sach)) ((ty nang) OR (ty xang)) xa hoi. hieu ve am thuc xay thanh san ca tren~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((su sach) OR (so sach)) ((ty nang) OR (ty xang)) xa hoi. hieu ve am thuc xay thanh san ca tren.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((su sach) or (so sach)) ((ty nang) OR (ty xang)) xa hoi. hieu ve am thuc xay thanh san ca tren".
• Adding a wildcard symbol may retrieve word variants: ((su sach) or (so sach)) ((ty nang) OR (ty xang)) xa hoi. hieu ve am thuc xay thanh san ca tren*.