Perhaps you should try some spelling variations:
lang van » dang van, tang van, hoang van
te sach » toc sach
tinh da » tinh va, tinh gia, tinh lao
tinh di » tinh doi, trinh di, tin di
cac duc » cac du, cao duc, cac dac
sach ty » sach y, sach tu, sach thu
hieu ve » hieu va, hieu van
nang xa » nang x, lang xa, nang ma
cua tre » cua te, cuu tre, cua triet
ve cac » va cac, vien cac

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: te sach ty ((nang xa) OR (lang van)) hoi. hieu ve cac duc va ((tinh di) OR (tinh da)) cua tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ty ((nang xa) or (lang van)) hoi. hieu ve cac duc va ((tinh di) OR (tinh da)) cua tre~".
• Adding a wildcard symbol may retrieve word variants: te sach ty ((nang xa) or (lang van)) hoi. hieu ve cac duc va ((tinh di) OR (tinh da)) cua tre*.