Perhaps you should try some spelling variations:
thanh vai » thanh hai, thanh van, thanh tai
tu sach » thu sach, su sach, te sach
sach ky » sac ky, sach y, sach ty
nang co » nang cao, nang doc, nang noi
hieu ve » hieu va, hieu van
ve cham » va cham, ve chat, vu cham
co hoi » co hoc, co loi
tuc va » thuc va, truc va, duc va
vai va » mai va, dai va, hai va

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

• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky nang co hoi. hieu ve cham ((tuc va) OR (tuc xa)) thanh vai va (thiet OR thieu)~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ky nang co hoi. hieu ve cham ((tuc va) or (tuc xa)) thanh vai va (thiet OR thieu)~".
• Adding a wildcard symbol may retrieve word variants: tu sach ky nang co hoi. hieu ve cham ((tuc va) or (tuc xa)) thanh vai va (thiet OR thieu)*.