Perhaps you should try some spelling variations:
trinh dai » trinh tai, trinh di, trinh da
va trinh » van trinh, va tinh, lap trinh
tu sach » thu sach, su sach, tu cach
te sach » toc sach
lang xa » lang ha, dang xay, lang van
hieu ve » hieu va, hieu van
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) or (te sach)) y lang xa hoi. hieu ve am hoc va trinh dai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (te sach)) y lang xa hoi. hieu ve am hoc va trinh dai cua tre.
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (te sach)) y lang xa hoi. hieu ve am hoc va trinh dai cua tre*.