Perhaps you should try some spelling variations:
thanh phan » thanh pho, thanh san, thanh toan
va thanh » gia thanh, ban thanh, va tinh
phan cuu » phan cau, phan huu, phan cung
sach dao » lanh dao
sach lo » sach doi, sach hoi, sach moi
hieu va » lieu va, hieu qua
cam tuc » cam xuc, cam tu, nam thuc
cuu tre » cua tre, cau tren, cau treo
co hoi » co hoc, co loi
va cam » va cham, va cac, va cao
tuc va » thuc va, truc va, tuc xa
x hoi » xa hoi, o hoi, x ho

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

• Performing a fuzzy search may retrieve terms with similar spellings: thuoc ((sach lo) OR (sach dao)) nang ((x hoi) or (co hoi)). hieu va cam tuc va thanh phan cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thuoc ((sach lo) OR (sach dao)) nang ((x hoi) OR (co hoi)). hieu va cam tuc va thanh phan cuu tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thuoc ((sach lo) OR (sach dao)) nang ((x hoi) or (co hoi)). hieu va cam tuc va thanh phan cuu tre*".