Perhaps you should try some spelling variations:
trinh tai » trinh toan, trinh tu, trinh han
va trinh » van trinh, va tinh, lap trinh
tu sach » thu sach, su sach, te sach
lang xa » lang ha, dang xay, lang van
hieu ve » hieu va, hieu van
cuu tre » cau tren, cau treo
cua tre » cua triet, dua tren, cua thep
y lang » o lang, _ lang, tay lang
am hoc » ad hoc
cua te » cua tu
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 trinh tai ((cuu tre) OR (((cua tre) OR (cua te))))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach y lang xa hoi. hieu ve am hoc va trinh tai ((cuu tre) or (((cua tre) OR (cua te))))~".
• Adding a wildcard symbol may retrieve word variants: tu sach y lang xa hoi. hieu ve am hoc va trinh tai ((cuu tre) or (((cua tre) OR (cua te))))*.