Perhaps you should try some spelling variations:
vien chat » van chat, vien cac, vien cao
hieu vien » hieu hien, hieu viec, thieu nien
cua viet » hoa viet, cua vat, cua dieu
thu sach » thuat sach, thuoc sach, thu hoach
ban hanh » ban hang
chat xuc » chat huu, cam xuc, chao xu
xuc ban » duc ban, cuc ban, quoc ban
tu sach » su sach, te sach, tu cach
nang ma » tang ma, sang ma, nang cao
ca viet » va viet, co viet, hoa viet
ma hoi » mai hoi, xa hoi, ma hoa

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) OR (thu sach)) ky nang ma hoi. hieu vien chat xuc ban hanh vi ((cua viet) or (ca viet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (thu sach)) ky nang ma hoi. hieu vien chat xuc ban hanh vi ((cua viet) OR (ca viet)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sach) OR (thu sach)) ky nang ma hoi. hieu vien chat xuc ban hanh vi ((cua viet) or (ca viet))".
• Adding a wildcard symbol may retrieve word variants: ((tu sach) OR (thu sach)) ky nang ma hoi. hieu vien chat xuc ban hanh vi ((cua viet) or (ca viet))*.