Perhaps you should try some spelling variations:
van hanh » van thanh, ban hanh, van anh
cham xuc » cam xuc, chat xuc, pham duc
te sach » toc sach
hanh di » hanh vi, hanh de, hang di
hieu va » lieu va, hieu qua
dai hoi » dai hoc, dai hai, dai moi
mai hoi » mai khoi, lai hoi, mai doi
cua tre » cua te, cuu tre, cua triet
y nang » ky nang, ly nang, v nang
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 y nang ((mai hoi) or (dai hoi)). hieu va ((cham xuc) OR (cham soc)) van hanh di cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach y nang ((mai hoi) OR (dai hoi)). hieu va ((cham xuc) OR (cham soc)) van hanh di cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach y nang ((mai hoi) or (dai hoi)). hieu va ((cham xuc) OR (cham soc)) van hanh di cua tre".
• Adding a wildcard symbol may retrieve word variants: te sach y nang ((mai hoi) or (dai hoi)). hieu va ((cham xuc) OR (cham soc)) van hanh di cua tre*.