Perhaps you should try some spelling variations:
va thanh » gia thanh, ban thanh, va tinh
van hanh » van thanh, ban hanh, van anh
cac xuc » cam xuc, cac nuoc, chat xuc
su sac » su sach, su cac, su xac
sac ky » cac ky, sai ky
x hoi » o hoi, x ho, 5 hoi
vi va » vi van, vai va, vu va
thiet » thieu

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

• Performing a fuzzy search may retrieve terms with similar spellings: su sac ky nang ((x hoi) OR (xa hoi)). lieu va cac xuc ((va thanh) or (van hanh)) vi va thiet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sac ky nang ((x hoi) OR (xa hoi)). lieu va cac xuc ((va thanh) OR (van hanh)) vi va thiet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sac ky nang ((x hoi) OR (xa hoi)). lieu va cac xuc ((va thanh) or (van hanh)) vi va thiet".
• Adding a wildcard symbol may retrieve word variants: su sac ky nang ((x hoi) OR (xa hoi)). lieu va cac xuc ((va thanh) or (van hanh)) vi va thiet*.