Perhaps you should try some spelling variations:
van thanh » ban thanh, van tuan
cham duc » pham duc, cham soc, pham duy
thai cua » than cua, tai cuc, tri cua
van hanh » ban hanh, van anh, van ban
cua tre » cua te, cuu tre, cua triet
ve cham » va cham, ve chat, vu cham
hieu ve » hieu va, hieu van
lang xa » lang ha, dang xay, lang van
dang va » dang van, dang vat, hang va
sac ky » cac ky, sai ky
su sac » su sach, su cac, su xac

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

• Performing a fuzzy search may retrieve terms with similar spellings: su sac ky ((dang va) or (lang xa)) hoi. hieu ve cham duc ((van hanh) or (van thanh)) thai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sac ky ((dang va) OR (lang xa)) hoi. hieu ve cham duc ((van hanh) OR (van thanh)) thai cua tre.
• Adding a wildcard symbol may retrieve word variants: su sac ky ((dang va) or (lang xa)) hoi. hieu ve cham duc ((van hanh) or (van thanh)) thai cua tre*.