Perhaps you should try some spelling variations:
chieu chien » thien chien
hieu hien » bieu hien, dieu hien, dieu khien
dinh gia » danh gia, tinh gia
gia cua » gian cua, giau cua, gia cuc
va dinh » van dinh, va kinh, va tinh
cac cao » cac co, ca cao, bac cao
sach ky » sach y, sach ty, sach kem
nang xa » nang x, lang xa, nang ma
cua tre » cua te, cuu tre, cua triet
cao va » cao van, tao va, co 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 cao va dinh gia 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 cao va dinh gia 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 cao va dinh gia cua tre*.