Perhaps you should try some spelling variations:
cham xuc » cam xuc, chat xuc, cham soc
hanh tai » thanh tai, hang tai, han tai
tu sach » thu sach, su sach, te sach
nang ma » tang ma, sang ma, nang cao
hieu vu » hieu va, hieu ve, dieu vu
hieu su » hieu sau, tieu su, hieu so
va hanh » van hanh, va thanh, va danh
y nang » ky nang, ly nang, v nang
ma hoi » mai hoi, xa hoi, ma hoa
xuc va » duc va, tuc va, luc va
tai va » thai va, mai va, tri 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: tu sach y nang ma hoi. ((hieu vu) or (hieu su)) cham xuc va hanh tai va thiet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach y nang ma hoi. ((hieu vu) OR (hieu su)) cham xuc va hanh tai va thiet.
• Adding a wildcard symbol may retrieve word variants: tu sach y nang ma hoi. ((hieu vu) or (hieu su)) cham xuc va hanh tai va thiet*.