Perhaps you should try some spelling variations:
hoc sach » hoc sinh, hoc cac, hoc anh
danh tai » doanh tai, dinh tai, hanh tai
va danh » va dinh, va dan, va hanh
tai cua » thai cua, tai cuc, tri cua
va nam » van nam, ha nam, va nay
nam tu » nam thu, nam thuc
cua te » cua tu
x hoi » xa hoi, x ho, 5 hoi
o hoi » co hoi, o hoc, o hai

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((hoc sach) or (dac sac)) ky nang ((x hoi) OR (o hoi)). lieu va nam tu va danh tai cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((hoc sach) OR (dac sac)) ky nang ((x hoi) OR (o hoi)). lieu va nam tu va danh tai cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((hoc sach) or (dac sac)) ky nang ((x hoi) OR (o hoi)). lieu va nam tu va danh tai cua te".
• Adding a wildcard symbol may retrieve word variants: ((hoc sach) or (dac sac)) ky nang ((x hoi) OR (o hoi)). lieu va nam tu va danh tai cua te*.