Perhaps you should try some spelling variations:
thanh hai » thanh phan, thanh hoa, thanh san
cham duc » pham duc, cham soc, pham duy
tu sach » thu sach, su sach, te sach
duc ban » duc tan, duc van, dua ban
ve cham » va cham, ve chat, vu cham
hieu ve » hieu va, hieu van
cao hoc » co hoc, cho hoc, chat hoc
vu sach » vu bach, su sach, vu khach
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: ((tu sach) or (vu sach)) ky nang cao hoc. hieu ve cham duc ban ((thanh hai) or (doanh tai)) cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (vu sach)) ky nang cao hoc. hieu ve cham duc ban ((thanh hai) OR (doanh tai)) cua tre.
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (vu sach)) ky nang cao hoc. hieu ve cham duc ban ((thanh hai) or (doanh tai)) cua tre*.