Perhaps you should try some spelling variations:
trinh dinh » trinh kinh, trinh sinh, trinh dung
trinh di » trinh do, trinh dien, trinh tai
lang van » dang van, tang van, hoang van
tu sach » thu sach, su sach, te sach
lam xuc » cam xuc, lam duoc
cua tre » cua te, cuu tre, cua triet
sach ky » sac ky, sach y, sach ty
hieu ve » hieu va, hieu van
lang xa » lang ha, dang xay
xuc va » duc va, tuc va, luc va
ve lam » va lam, de lam, se lam

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 ky ((lang xa) or (lang van)) hoi. hieu ve lam xuc va ((trinh di) OR (trinh dinh)) cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky ((lang xa) OR (lang van)) hoi. hieu ve lam xuc va ((trinh di) OR (trinh dinh)) cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ky ((lang xa) or (lang van)) hoi. hieu ve lam xuc va ((trinh di) OR (trinh dinh)) cua tre".
• Adding a wildcard symbol may retrieve word variants: tu sach ky ((lang xa) or (lang van)) hoi. hieu ve lam xuc va ((trinh di) OR (trinh dinh)) cua tre*.