Perhaps you should try some spelling variations:
dang xay » dang van, van xay
tinh hai » tinh thai, tinh chat, trinh han
qua pham » quan pham, quy pham, qua cham
tu sach » thu sach, su sach, te sach
hai cua » thai cua, dai cua, hoi cua
va tinh » may tinh
cua tre » cua te, cuu tre, cua triet
sach ty » sach y, sach tu, sach thu
lang xa » lang ha, lang van
tang ma » mang may, tang van

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 ty ((tang ma) or (((lang xa) OR (dang xay)))) hoi. hieu qua pham duc va tinh hai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ty ((tang ma) OR (((lang xa) OR (dang xay)))) hoi. hieu qua pham duc va tinh hai cua tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ty ((tang ma) or (((lang xa) OR (dang xay)))) hoi. hieu qua pham duc va tinh hai cua tre*".