Perhaps you should try some spelling variations:
danh dien » dinh dien, danh kien, danh lien
cham hoc » cham soc, chat hoc, cham hoi
cua tre » cua te, cuu tre, cua triet
danh di » danh du, xanh di, danh gia
ve cham » va cham, ve chat, vu cham
hieu ve » hieu va, hieu van
nang ma » tang ma, sang ma, nang cao
lang xa » lang ha, dang xay, lang van
sac ky » cac ky, sai ky
vu sac » vu sach, vu san, va sac

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

• Performing a fuzzy search may retrieve terms with similar spellings: vu sac ky ((lang xa) or (nang ma)) hoi. hieu ve cham hoc va ((danh di) or (danh dien)) cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu sac ky ((lang xa) OR (nang ma)) hoi. hieu ve cham hoc va ((danh di) OR (danh dien)) cua tre.
• Adding a wildcard symbol may retrieve word variants: vu sac ky ((lang xa) or (nang ma)) hoi. hieu ve cham hoc va ((danh di) or (danh dien)) cua tre*.