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

You may be able to get more results by adjusting your search query.

• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach y lang xa hoi. hieu ve am hoc va ((tinh dai) OR (tinh da)) ((cua tre) OR (cuu tre))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach y lang xa hoi. hieu ve am hoc va ((tinh dai) OR (tinh da)) ((cua tre) or (cuu tre))~".
• Adding a wildcard symbol may retrieve word variants: tu sach y lang xa hoi. hieu ve am hoc va ((tinh dai) OR (tinh da)) ((cua tre) or (cuu tre))*.