Perhaps you should try some spelling variations:
chat xuc » chat huu, cam xuc, chao xu
va thanh » gia thanh, ban thanh, va tinh
van hanh » van thanh, ban hanh, van anh
vu sach » vu bach, su sach, vu khach
sach ky » sac ky, sach y, sach ty
va chat » van chat, va phat, cao chat
vai va » mai va, dai va, lai va
hai va » hai van, thai va, hoi va
x hoi » xa hoi, o hoi, x ho
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: vu sach ky nang x hoi. lieu va chat xuc ((va thanh) or (van hanh)) ((vai va) OR (hai va)) thiet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu sach ky nang x hoi. lieu va chat xuc ((va thanh) OR (van hanh)) ((vai va) OR (hai va)) thiet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "vu sach ky nang x hoi. lieu va chat xuc ((va thanh) or (van hanh)) ((vai va) OR (hai va)) thiet".
• Adding a wildcard symbol may retrieve word variants: vu sach ky nang x hoi. lieu va chat xuc ((va thanh) or (van hanh)) ((vai va) OR (hai va)) thiet*.