Perhaps you should try some spelling variations:
thanh hoi » thanh hoai, thanh hoa, thanh hai
ban thanh » ban hanh, ban hang
duc ban » duc tan, duc van, dua ban
sach tu » sach thu, sach ty, sach uu
cam duc » cam xuc, cao duc, pham duc
nang xa » nang x, lang xa, nang ma
cach tu » cach thuc
cuu tre » cua tre, cau tren, cau treo
va cam » va cham, va cac, va cao
cua te » cua tu

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 tu) OR (cach tu)) nang xa hoi. lieu va cam duc ban thanh hoi ((cua te) or (cuu tre))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su ((sach tu) OR (cach tu)) nang xa hoi. lieu va cam duc ban thanh hoi ((cua te) OR (cuu tre)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "su ((sach tu) OR (cach tu)) nang xa hoi. lieu va cam duc ban thanh hoi ((cua te) or (cuu tre))".
• Adding a wildcard symbol may retrieve word variants: su ((sach tu) OR (cach tu)) nang xa hoi. lieu va cam duc ban thanh hoi ((cua te) or (cuu tre))*.