Perhaps you should try some spelling variations:
trong xa » trong xay, trong ca, trong xu
trinh vi » trinh va, trinh ve, trinh viet
vu sach » vu bach, su sach, vu khach
sach ty » sach y, sach tu, sach thu
tinh vi » tinh voi, tinh va, dinh vi
cua tre » cua te, cuu tre, cua triet
hieu de » hieu ve, hieu he, hieu le
lang xa » lang ha, dang xay, lang van
co tuc » co thuc, co tu, co toc
tuc va » thuc va, truc va, tuc xa
de co » ke co

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

• Performing a fuzzy search may retrieve terms with similar spellings: vu sach ty ((lang xa) or (trong xa)) hoi. hieu de co tuc va ((tinh vi) or (trinh vi)) cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu sach ty ((lang xa) OR (trong xa)) hoi. hieu de co tuc va ((tinh vi) OR (trinh vi)) cua tre.
• Adding a wildcard symbol may retrieve word variants: vu sach ty ((lang xa) or (trong xa)) hoi. hieu de co tuc va ((tinh vi) or (trinh vi)) cua tre*.