Perhaps you should try some spelling variations:
chieu chien » thien chien
hieu hien » bieu hien, dieu hien, dieu khien
dinh via » dinh gia, dinh vi, dinh va
via cua » gia cua, gian cua, giau cua
va dinh » van dinh, va kinh, va tinh
cac lao » ca lao, cac loai, cac giao
sach ky » sach y, sach ty, sach kem
nang xa » nang x, lang xa, nang ma
cua tre » cua te, cuu tre, cua triet
lao va » tao va, cao va, bao va
sac ky » cac ky, sai ky

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) or (sac ky)) nang xa hoi. ((hieu hien) OR (chieu chien)) cac lao va dinh via cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((sach ky) OR (sac ky)) nang xa hoi. ((hieu hien) OR (chieu chien)) cac lao va dinh via cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu ((sach ky) or (sac ky)) nang xa hoi. ((hieu hien) OR (chieu chien)) cac lao va dinh via cua tre".
• Adding a wildcard symbol may retrieve word variants: tu ((sach ky) or (sac ky)) nang xa hoi. ((hieu hien) OR (chieu chien)) cac lao va dinh via cua tre*.