Perhaps you should try some spelling variations:
suc thiet » soc thiet, luc thiet, suc thuyet
thu sach » tu sach, thuat sach, thuoc sach
cham vuc » cham soc, pham duc, cham cuu
van hanh » van thanh, ban hanh, van ban
sach ky » sac ky, sach y, sach ty
nang xa » nang x, lang xa, nang ma
va cham » va chat, va tham
van anh » van thanh, tuan anh, van minh
hoi suc » hoi chuc

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

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