Perhaps you should try some spelling variations:
hanh hai » thanh hai, nhanh hai, hang hai
sach kem » hanh kem
hai cua » thai cua, dai cua, hoi cua
va hanh » van hanh, va thanh, va danh
cua tre » cua te, cuu tre, cua triet
nang xa » nang x, lang xa, nang ma
sach ty » sach y, sach tu, sach thu
xuc va » duc va, tuc va, luc va
va cao » va co, va dao, va bao

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: su ((sach kem) or (sach ty)) nang xa hoi. lieu ((va cao) OR (va cac)) xuc va hanh hai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su ((sach kem) OR (sach ty)) nang xa hoi. lieu ((va cao) OR (va cac)) xuc va hanh hai cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su ((sach kem) or (sach ty)) nang xa hoi. lieu ((va cao) OR (va cac)) xuc va hanh hai cua tre".
• Adding a wildcard symbol may retrieve word variants: su ((sach kem) or (sach ty)) nang xa hoi. lieu ((va cao) OR (va cac)) xuc va hanh hai cua tre*.