Perhaps you should try some spelling variations:
tu sach » thu sach, su sach, te sach
truc va » thuc va, thuc vat, trung va
ty lang » tay lang, ty hang, tu lang
tinh di » tinh doi, trinh di, tinh da
hieu ve » hieu van
va tinh » may tinh
hieu va » lieu va, hieu qua
di cua » dai cua, doi cua, de cua
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 truc va tinh di 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 truc va tinh di cua te*.