Perhaps you should try some spelling variations:
thien van » thi van
tinh voi » trinh voi, tinh doi, binh voi
sach thu » sach thue, sach thieu, sach tham
truc may » tren may, truc va
lam truc » lam truoc, nam truc, lam thuoc
voi cua » hoi cua, doi cua, moi cua
cua tre » cua te, cuu tre, cua triet
sach ty » sach y, sach tu, xach tay
hieu ve » hieu va, hieu van
nang xa » nang x, lang xa, nang ma

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 ty) OR (sach thu)) nang xa hoi. ((hieu ve) or (thien van)) lam truc may tinh voi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((sach ty) OR (sach thu)) nang xa hoi. ((hieu ve) OR (thien van)) lam truc may tinh voi cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu ((sach ty) OR (sach thu)) nang xa hoi. ((hieu ve) or (thien van)) lam truc may tinh voi cua tre".
• Adding a wildcard symbol may retrieve word variants: tu ((sach ty) OR (sach thu)) nang xa hoi. ((hieu ve) or (thien van)) lam truc may tinh voi cua tre*.