Perhaps you should try some spelling variations:
thanh than » thanh thanh, thanh thang, thanh toan
tan thanh » tran thanh, tang thanh, toan thanh
cham duc » pham duc, cham soc, pham duy
than cua » nhan cua, thai cua, ban cua
su sach » so sach, vu sach
ky tang » ky nang, kho tang, ky trong
ky dang » ky nang, ky danh
hieu ve » hieu va, hieu van
ve cham » va cham, ve chat, vu cham
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: su sach ((ky tang) or (ky dang)) xa hoi. hieu ve cham duc tan thanh than cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ((ky tang) OR (ky dang)) xa hoi. hieu ve cham duc tan thanh than cua tre.
• Adding a wildcard symbol may retrieve word variants: su sach ((ky tang) or (ky dang)) xa hoi. hieu ve cham duc tan thanh than cua tre*.