Perhaps you should try some spelling variations:
tay lang » tai lang, tay quang, tham lang
dan khai » dang khai, van khai, dang khoi
tay tang » tay trung, tay quang, tay tieng
tu sach » thu sach, su sach, te sach
dan hai » doan hai, dang hai, van hai
cua tre » cua te, cuu tre, cua triet
qua ca » qua cac, qua cua, qua cai
thu va » thuc va, thue va, tu va
ca thu » cac thu, cam thu, ca tru

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 ((tay lang) or (tay tang)) xa hoi. hieu qua ca thu va ((dan hai) OR (dan khai)) cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ((tay lang) OR (tay tang)) xa hoi. hieu qua ca thu va ((dan hai) OR (dan khai)) cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ((tay lang) or (tay tang)) xa hoi. hieu qua ca thu va ((dan hai) OR (dan khai)) cua tre".
• Adding a wildcard symbol may retrieve word variants: tu sach ((tay lang) or (tay tang)) xa hoi. hieu qua ca thu va ((dan hai) OR (dan khai)) cua tre*.