Perhaps you should try some spelling variations:
toc sach » hoc sach, doc sach, thuoc sach
hanh tai » thanh tai, hang tai, han tai
tai cuu » tai cuc, tai buu, tai cua
xa hanh » xa thanh, xa khanh, va hanh
sach ky » sac ky, sach y, sach ty
hieu va » lieu va
mai hoi » mai khoi, dai hoi, lai hoi
cuu tre » cua tre, cau tren, cau treo
thu xa » thu xac, thu ha, thu xe
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: toc sach ky nang ((ma hoi) OR (mai hoi)). ((hieu va) or (hieu qua)) nam thu xa hanh tai cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc sach ky nang ((ma hoi) OR (mai hoi)). ((hieu va) OR (hieu qua)) nam thu xa hanh tai cuu tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "toc sach ky nang ((ma hoi) OR (mai hoi)). ((hieu va) or (hieu qua)) nam thu xa hanh tai cuu tre".
• Adding a wildcard symbol may retrieve word variants: toc sach ky nang ((ma hoi) OR (mai hoi)). ((hieu va) or (hieu qua)) nam thu xa hanh tai cuu tre*.