Perhaps you should try some spelling variations:
cham xuc » cam xuc, chat xuc, pham duc
ban hanh » ban hang
van hanh » van thanh, van anh, van ban
tu sach » thu sach, su sach, te sach
sach ky » sac ky, sach y, sach ty
nang ma » tang ma, sang ma, nang cao
hieu tu » chieu tu, hieu tuc, hien tu
ma hoi » mai hoi, xa hoi, ma hoa
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: tu sach ky nang ma hoi. hieu tu ((cham xuc) or (cham soc)) ((ban hanh) or (van hanh)) tri va thiet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky nang ma hoi. hieu tu ((cham xuc) OR (cham soc)) ((ban hanh) OR (van hanh)) tri va thiet.
• Adding a wildcard symbol may retrieve word variants: tu sach ky nang ma hoi. hieu tu ((cham xuc) or (cham soc)) ((ban hanh) or (van hanh)) tri va thiet*.