Perhaps you should try some spelling variations:
van hanh » van thanh, ban hanh, van anh
cac nuoc » cap nuoc, hoc nuoc, dat nuoc
te sach » toc sach
sach ty » sach y, sach tu, sach thu
hanh di » hanh vi, hanh de, hang di
cac xuc » cam xuc, chat xuc, cac cuoc
cua cau » cua cac, cua chu, cua cay
hieu ve » hieu va, hieu van
toc hoc » toan hoc, duoc hoc
doc hoc » duoc hoc, duc hoc, hoc hoc
ty nang » ky nang, ty xang, ty hang
di cua » dai cua, doi cua, de 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 ty nang ((doc hoc) OR (toc hoc)). hieu ve ((cac xuc) or (cac nuoc)) van hanh di cua cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ty nang ((doc hoc) OR (toc hoc)). hieu ve ((cac xuc) OR (cac nuoc)) van hanh di cua cau*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ty nang ((doc hoc) OR (toc hoc)). hieu ve ((cac xuc) or (cac nuoc)) van hanh di cua cau*".