Perhaps you should try some spelling variations:
van thiet » va thiet, dan thiet, can thiet
cac nuoc » cap nuoc, hoc nuoc, dat nuoc
va thanh » gia thanh, ban thanh, va tinh
van hanh » van thanh, ban hanh, van anh
vu sach » vu bach, su sach, vu khach
cac xuc » cam xuc, chat xuc, cac cuoc
y nang » ky nang, ly nang, v nang
x hoi » xa hoi, o hoi, x ho

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

• Performing a fuzzy search may retrieve terms with similar spellings: vu sach y nang x hoi. lieu va ((cac xuc) or (cac nuoc)) ((va thanh) or (van hanh)) vi van thiet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu sach y nang x hoi. lieu va ((cac xuc) OR (cac nuoc)) ((va thanh) OR (van hanh)) vi van thiet.
• Adding a wildcard symbol may retrieve word variants: vu sach y nang x hoi. lieu va ((cac xuc) or (cac nuoc)) ((va thanh) or (van hanh)) vi van thiet*.