Perhaps you should try some spelling variations:
tinh hai » tinh thai, tinh chat, trinh han
tu sach » thu sach, su sach, te sach
lang xa » lang ha, dang xay, lang van
hieu ve » hieu va, hieu van
va tinh » may tinh
hai cua » thai cua, hoi cua, dai cua
cua tre » cua te, cuu tre, cua triet
y lang » o lang, _ lang, tay lang

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 y lang xa hoi. hieu ve ((am hoc) or (ad hoc)) va tinh hai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach y lang xa hoi. hieu ve ((am hoc) OR (ad hoc)) va tinh hai cua tre.
• Adding a wildcard symbol may retrieve word variants: tu sach y lang xa hoi. hieu ve ((am hoc) or (ad hoc)) va tinh hai cua tre*.