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
hanh di » hanh vi, hanh de, hang di
cac xuc » cam xuc, chat xuc, cac cuoc
hieu ve » hieu va, hieu van
di cua » dai cua, doi cua, de cua
cua cu » cua chu, cua cau, cua su

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 ((thi hanh) OR (thi thanh)) xa hoi. hieu ve ((cac xuc) or (cac nuoc)) van hanh di cua cu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ((thi hanh) OR (thi thanh)) xa hoi. hieu ve ((cac xuc) OR (cac nuoc)) van hanh di cua cu.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ((thi hanh) OR (thi thanh)) xa hoi. hieu ve ((cac xuc) or (cac nuoc)) van hanh di cua cu".
• Adding a wildcard symbol may retrieve word variants: te sach ((thi hanh) OR (thi thanh)) xa hoi. hieu ve ((cac xuc) or (cac nuoc)) van hanh di cua cu*.