Perhaps you should try some spelling variations:
van thanh » ban thanh, van tuan
nhan cuoc » nhung cuoc, nhan luc, nhan cua
nhan cuu » nhan cua, nghen cuu, nhan chua
thanh va » thanh van, hanh va, thanh ha
hieu van » hieu va, thien van, lieu va
te sach » toc sach
cao hoc » co hoc, cho hoc, chat hoc
ly nang » ky nang, ly hang, ly vang
cua tre » cua te, cuu tre, cua triet
y nang » ky nang, v nang, may nang
va cua » va chua, via cua, ca cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: te sach ((y nang) or (ly nang)) cao hoc. hieu van ((nhan cuu) OR (nhan cuoc)) van thanh va cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ((y nang) OR (ly nang)) cao hoc. hieu van ((nhan cuu) OR (nhan cuoc)) van thanh va cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ((y nang) or (ly nang)) cao hoc. hieu van ((nhan cuu) OR (nhan cuoc)) van thanh va cua tre".
• Adding a wildcard symbol may retrieve word variants: te sach ((y nang) or (ly nang)) cao hoc. hieu van ((nhan cuu) OR (nhan cuoc)) van thanh va cua tre*.