Perhaps you should try some spelling variations:
dat khanh » van khanh, duy khanh
sach ky » sac ky, sach y, sach ty
vai cua » dai cua, hai cua, lai cua
xa hanh » xa thanh, xa khanh, va hanh
cac tuc » cac toc, cac tu, cac tac
su sach » so sach, vu sach
mai hoi » mai khoi, dai hoi, lai hoi
ky tang » ky nang, ky dang, kho tang
cua tre » cua te, cuu tre, cua triet
ma hoi » xa hoi, ma hoa, me hoi

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 ((ma hoi) OR (mai hoi)). lieu va cac tuc ((xa hanh) or (dat khanh)) vai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ky tang ((ma hoi) OR (mai hoi)). lieu va cac tuc ((xa hanh) OR (dat khanh)) vai cua tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ky tang ((ma hoi) OR (mai hoi)). lieu va cac tuc ((xa hanh) or (dat khanh)) vai cua tre*".