Perhaps you should try some spelling variations:
cham xuc » cam xuc, chat xuc, cham soc
van hanh » van thanh, ban hanh, van anh
su viet » so viet
va dinh » van dinh, va kinh, va tinh
hieu va » hieu qua
tang ma » mang may, tang van
ky tang » ky nang, ky dang, kho tang
sac ky » cac ky, sai ky
ma hoi » mai hoi, xa hoi, ma hoa
so sac » so sach, so dac

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

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