Perhaps you should try some spelling variations:
thanh tai » thanh hai, thanh toan, doanh tai
ban thanh » ban hanh, ban hang
chat dua » chat cua, chat lua, hat dua
lang ha » long ha
sach lo » sach dao, sach doi, sach hoi
tai cua » thai cua, tai cuc, tri cua
cua tre » cua te, cuu tre, cua triet
ha hoi » hoa hoi, ha noi, xa hoi

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

• Performing a fuzzy search may retrieve terms with similar spellings: thu ((sach lo) or (sac o)) lang ha hoi. hieu qua ((chat dua) or (chay dua)) ban thanh tai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu ((sach lo) OR (sac o)) lang ha hoi. hieu qua ((chat dua) OR (chay dua)) ban thanh tai cua tre.
• Adding a wildcard symbol may retrieve word variants: thu ((sach lo) or (sac o)) lang ha hoi. hieu qua ((chat dua) or (chay dua)) ban thanh tai cua tre*.