Perhaps you should try some spelling variations:
thanh hoa » thanh pho
cham cua » chat cua, cham cuu, ham cua
thanh ho » thanh pho, thanh hoc, thanh ha
te sach » toc sach
ve cham » va cham, ve chat, vu cham
sach ky » sac ky, sach y, sach ty
hieu ve » hieu va, hieu van
dai moi » doi moi, dai hoi
mai hoi » mai khoi, dai hoi, lai hoi
cua tre » cua te, cuu tre, cua triet

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

• Performing a fuzzy search may retrieve terms with similar spellings: te sach ky nang ((mai hoi) or (dai moi)). hieu ve cham cua ban ((thanh ho) OR (thanh hoa)) cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ky nang ((mai hoi) OR (dai moi)). hieu ve cham cua ban ((thanh ho) OR (thanh hoa)) cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ky nang ((mai hoi) or (dai moi)). hieu ve cham cua ban ((thanh ho) OR (thanh hoa)) cua tre".
• Adding a wildcard symbol may retrieve word variants: te sach ky nang ((mai hoi) or (dai moi)). hieu ve cham cua ban ((thanh ho) OR (thanh hoa)) cua tre*.