Perhaps you should try some spelling variations:
thuoc sach » hoc sach, nuoc sach, thuat sach
van chat » cao chat
hieu van » hieu va, thien van, lieu va
su sach » so sach, vu sach
lang xa » lang ha, dang xay, lang van
ky lang » ky nang, ky dang, ky tang
cua tre » cua te, cuu tre, cua triet
tuc va » thuc va, truc va, duc va
dap vi » dap ve, lap vi, dap va
vi cua » vai cua, di cua

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 (thuoc sach)) ky lang xa hoi. hieu van chat ((tuc va) or (tuc xa)) dap vi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((su sach) OR (thuoc sach)) ky lang xa hoi. hieu van chat ((tuc va) OR (tuc xa)) dap vi cua tre.
• Adding a wildcard symbol may retrieve word variants: ((su sach) or (thuoc sach)) ky lang xa hoi. hieu van chat ((tuc va) or (tuc xa)) dap vi cua tre*.