Perhaps you should try some spelling variations:
tinh doi » trinh doc, trinh do, tinh hoc
tu sach » thu sach, su sach, te sach
cau tuc » cau truc, cau tu, cau luc
ty lang » tay lang, ty hang, tu lang
doi cua » dai cua, hoi cua
hieu ve » hieu van
va tinh » may tinh
hieu va » lieu va, hieu qua
tuc va » thuc va, truc va, tuc xa
cua te » cua tu

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 ((ty lang) OR (ty xang)) xa hoi. ((hieu ve) OR (hieu va)) cau tuc va tinh doi cua te~.
• Adding a wildcard symbol may retrieve word variants: tu sach ((ty lang) or (ty xang)) xa hoi. ((hieu ve) or (hieu va)) cau tuc va tinh doi cua te*.