Perhaps you should try some spelling variations:
toc sach » hoc sach, doc sach, thuoc sach
hanh tai » thanh tai, hang tai, han tai
ban hanh » ban hang
xuc ban » duc ban, cuc ban, quoc ban
nang co » nang cao, nang doc, nang noi
cua tu » cua tuc, cua su, cua cu
y nang » ky nang, ly nang, v nang
va cao » va co, va dao, va bao
co hoi » co hoc, co loi

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 y nang co hoi. hieu ((va cao) OR (va cac)) xuc ban hanh tai ((cua te) or (cua tu))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc sach y nang co hoi. hieu ((va cao) OR (va cac)) xuc ban hanh tai ((cua te) OR (cua tu)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "toc sach y nang co hoi. hieu ((va cao) OR (va cac)) xuc ban hanh tai ((cua te) or (cua tu))".
• Adding a wildcard symbol may retrieve word variants: toc sach y nang co hoi. hieu ((va cao) OR (va cac)) xuc ban hanh tai ((cua te) or (cua tu))*.