Perhaps you should try some spelling variations:
thanh hoai » thanh hoa, thanh hai, thanh oai
ban thanh » ban hanh, ban hang
cham giua » tham gia, nhat giua, cam gia
giua ban » giup ban, dia ban, cua ban
hoai cuu » hoi cua, hoa cua, hoai thu
su sach » so sach, vu sach
sach ky » sac ky, sach y, sach ty
mai hoi » mai khoi, dai hoi, lai hoi
dai moi » doi moi, dai hoi
hieu ve » hieu va, hieu van
ve cham » va cham, ve chat, vu cham
cuu tre » cua tre, cau tren, cau treo

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 ky nang ((mai hoi) or (dai moi)). hieu ve cham giua ban thanh hoai cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ky nang ((mai hoi) OR (dai moi)). hieu ve cham giua ban thanh hoai cuu tre.
• Adding a wildcard symbol may retrieve word variants: su sach ky nang ((mai hoi) or (dai moi)). hieu ve cham giua ban thanh hoai cuu tre*.