Perhaps you should try some spelling variations:
hanh hai » thanh hai, nhanh hai, hang hai
sach ty » sach y, sach tu, sach thu
nang xa » nang x, lang xa, nang ma
qua cai » qua hai, qua ca, quan cau
qua cac » cua cac
va hanh » van hanh, va thanh, va danh
hai cua » thai cua, dai cua, hoi cua
cua tre » cua te, cuu tre, cua triet
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: so ((sach ty) or (sac ky)) nang xa hoi. hieu ((qua cai) or (qua cac)) duc va hanh hai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so ((sach ty) OR (sac ky)) nang xa hoi. hieu ((qua cai) OR (qua cac)) duc va hanh hai cua tre.
• Adding a wildcard symbol may retrieve word variants: so ((sach ty) or (sac ky)) nang xa hoi. hieu ((qua cai) or (qua cac)) duc va hanh hai cua tre*.