Perhaps you should try some spelling variations:
cham xuc » cam xuc, chat xuc, cham soc
van hanh » van thanh, ban hanh, van anh
sach ky » sac ky, sach y, sach ty
van han » van phan, van nhan, van hoan
su sach » so sach, vu sach
va cham » va chat, va tham
hieu va » lieu va, hieu qua
sang ma » tang ma, nang ma, sang tao
ky sang » ky nang, ky dang, ky tang
ma hoi » mai hoi, xa hoi, ma hoa
tai va » thai va, mai va, dai 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 sach ky sang ma hoi. hieu va cham xuc ((van han) or (van hanh)) ((tai va) or (tri va)) thiet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ky sang ma hoi. hieu va cham xuc ((van han) OR (van hanh)) ((tai va) OR (tri va)) thiet.
• Adding a wildcard symbol may retrieve word variants: su sach ky sang ma hoi. hieu va cham xuc ((van han) or (van hanh)) ((tai va) or (tri va)) thiet*.