Perhaps you should try some spelling variations:
thanh van » thanh san, thanh toan, thanh phan
toc sach » hoc sach, doc sach, thuoc sach
va thanh » gia thanh, ban thanh, va tinh
van luu » von luu, van lu, van luc
van lam » van nam
van cam » van nam, van cau, van dam
sach lo » sach dao, sach doi, sach hoi
lo nang » ho nang, ly nang, loai nang
luu tre » luu tru, cuu tre, luy tre
xuc va » duc va, tuc va, luc va
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: toc sach lo nang ((o hoi) or (xa hoi)). hieu ((van cam) OR (van lam)) xuc va thanh van luu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc sach lo nang ((o hoi) OR (xa hoi)). hieu ((van cam) OR (van lam)) xuc va thanh van luu tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "toc sach lo nang ((o hoi) or (xa hoi)). hieu ((van cam) OR (van lam)) xuc va thanh van luu tre*".