Perhaps you should try some spelling variations:
thu sach » thuat sach, thuoc sach, thu hoach
ty hoang » ty hang, huy hoang, thi hoang
hoang xa » hoang ha, hoang va, hoang xuan
tu sach » su sach, te sach, tu cach
duc van » duc va, duc tan, duc manh
hoi cua » hoi chuc
anh hoi » anh noi, anh hoc, anh khoa
cua tre » cua te, cuu tre, cua triet
xuc ban » duc ban, cuc ban, quoc ban
qua ca » qua cac, qua cua, qua cai

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)) ty hoang xa hoi. hieu qua ca ((xuc ban) or (duc van)) anh hoi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (thu sach)) ty hoang xa hoi. hieu qua ca ((xuc ban) OR (duc van)) anh hoi cua tre.
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (thu sach)) ty hoang xa hoi. hieu qua ca ((xuc ban) or (duc van)) anh hoi cua tre*.