Perhaps you should try some spelling variations:
thanh hai » thanh phan, thanh hoa, thanh san
toc sach » hoc sach, doc sach, thuoc sach
nhanh ha » thanh hoa, khanh hoa, nhan va
mai khoi » mai khoa, tai khoa, cac khoi
cam duc » cam xuc, cao duc, pham duc
cua tre » cua te, cuu tre, cua triet
sach ky » sac ky, sach y, sach ty
hieu ve » hieu va, hieu van
mai hoi » dai hoi, lai hoi, mai doi
ve cam » ve cham, ve cac, va cam

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

• Performing a fuzzy search may retrieve terms with similar spellings: toc sach ky nang ((mai hoi) OR (mai khoi)). hieu ve cam duc va ((thanh hai) or (nhanh ha)) cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc sach ky nang ((mai hoi) OR (mai khoi)). hieu ve cam duc va ((thanh hai) OR (nhanh ha)) cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "toc sach ky nang ((mai hoi) OR (mai khoi)). hieu ve cam duc va ((thanh hai) or (nhanh ha)) cua tre".
• Adding a wildcard symbol may retrieve word variants: toc sach ky nang ((mai hoi) OR (mai khoi)). hieu ve cam duc va ((thanh hai) or (nhanh ha)) cua tre*.