Perhaps you should try some spelling variations:
cang thang » cong thanh, dang thanh
sang than » dang thanh, sang tao, ban than
thu sach » thuat sach, thuoc sach, thu hoach
van dat » van dao, van dau, dan dat
thi van » thi lan, thi hanh, thi nang
lang xa » lang ha, dang xay, lang van
ky lang » ky nang, ky dang, ky tang
tu sach » su sach, te sach, tu cach
cua tre » cua te, cuu tre, cua triet
nuoc » quoc, duoc, ngoc

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 lang xa hoi. thi van dat nuoc va ((sang than) OR (cang thang)) cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((thu sach) OR (tu sach)) ky lang xa hoi. thi van dat nuoc va ((sang than) OR (cang thang)) cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((thu sach) or (tu sach)) ky lang xa hoi. thi van dat nuoc va ((sang than) OR (cang thang)) cua tre".
• Adding a wildcard symbol may retrieve word variants: ((thu sach) or (tu sach)) ky lang xa hoi. thi van dat nuoc va ((sang than) OR (cang thang)) cua tre*.