Perhaps you should try some spelling variations:
co sach » bo sach, cuon sach, hoc sach
sach ly » sach y, sach lo, sach ty
ly hang » ly quang
hang xa » hoang xa, hang va, hang ca
hieu va » lieu va, hieu qua
han tai » hang tai, nhan tai, van tai
cuc tre » duc tre, cua tre, cuu tre
tuc va » thuc va, truc va, duc va

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

• Performing a fuzzy search may retrieve terms with similar spellings: co sach ly hang xa hoi. hieu va cac ((tuc va) or (tuc xa)) han tai cuc tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: co sach ly hang xa hoi. hieu va cac ((tuc va) OR (tuc xa)) han tai cuc tre.
• Adding a wildcard symbol may retrieve word variants: co sach ly hang xa hoi. hieu va cac ((tuc va) or (tuc xa)) han tai cuc tre*.