Perhaps you should try some spelling variations:
thanh dat » thanh san, thanh hai, thanh van
thu sach » thuat sach, thuoc sach, thu hoach
xa thanh » va thanh, ha thanh, ta thanh
sau viet » su viet, dau viet, sau biet
hieu va » lieu va, hieu qua
tu sach » su sach, te sach, tu cach
dat sau » dat cau, dat su, day sau
me hoi » le hoi
co tuc » co thuc, co tu, co toc
va co » vo co

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((thu sach) or (tu sach)) ky nang ((me hoi) or (ma hoa)). hieu va co tuc xa thanh dat sau viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((thu sach) OR (tu sach)) ky nang ((me hoi) OR (ma hoa)). hieu va co tuc xa thanh dat sau viet.
• Adding a wildcard symbol may retrieve word variants: ((thu sach) or (tu sach)) ky nang ((me hoi) or (ma hoa)). hieu va co tuc xa thanh dat sau viet*.