Perhaps you should try some spelling variations:
tinh dai » trinh dai, tinh hai, tinh doi
tu sach » thu sach, su sach, te sach
lang xa » lang ha, dang xay, lang van
hieu ve » hieu va, hieu van
hoc may » hoc ma
tinh da » tinh va, tinh gia, tinh lao
cua tre » cua te, cuu tre, cua triet
y lang » o lang, _ lang, tay lang
am hoc » ad hoc
ve am » va am

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 may ((tinh dai) OR (tinh da)) cua tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach y lang xa hoi. hieu ve am hoc may ((tinh dai) OR (tinh da)) cua tre".
• Adding a wildcard symbol may retrieve word variants: tu sach y lang xa hoi. hieu ve am hoc may ((tinh dai) OR (tinh da)) cua tre*.