Perhaps you should try some spelling variations:
thu sach » thuat sach, thuoc sach, thu hoach
cua viet » ca viet, hoa viet, cua vat
tu sach » su sach, te sach, tu cach
ky dang » ky nang, ky danh
dang xa » dang xay, lang xa, dang ha
cac dac » cac dan, cac dai, cac bac
cac ban » cac dan, cac van, can ban
dan vai » dan va, dan tai, dan vat
vai cua » dai cua, hai cua, lai cua
va dan » ca dan, va dao, va dau

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) or (thu sach)) ky dang xa hoi. lieu va ((cac dac) or (cac ban)) va dan vai cua viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (thu sach)) ky dang xa hoi. lieu va ((cac dac) OR (cac ban)) va dan vai cua viet.
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (thu sach)) ky dang xa hoi. lieu va ((cac dac) or (cac ban)) va dan vai cua viet*.