Perhaps you should try some spelling variations:
tu sach » thu sach, su sach, te sach
ky lang » ky nang, ky tang, tay lang
ky dang » ky nang, ky danh
hieu va » lieu va, hieu qua
cam thu » nam thu, cac thu, ca thu
dan vat » dang vat, van vat, dan va
vat cua » mat cua, bat cua, dat cua
cua tre » cua te, cuu tre, cua triet
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 ((ky lang) or (ky dang)) xa hoi. hieu va ((am thuc) or (cam thu)) va dan vat cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ((ky lang) OR (ky dang)) xa hoi. hieu va ((am thuc) OR (cam thu)) va dan vat cua tre.
• Adding a wildcard symbol may retrieve word variants: tu sach ((ky lang) or (ky dang)) xa hoi. hieu va ((am thuc) or (cam thu)) va dan vat cua tre*.