Perhaps you should try some spelling variations:
viec bach » viec ban, viec bao, viet sach
va thanh » gia thanh, ban thanh, va tinh
sach ky » sac ky, sach y, sach ty
tu sach » thu sach, su sach, te sach
dang xa » dang xay, lang xa, dang ha
ky dang » ky nang, ky danh
xuc va » duc va, tuc va, luc va
va cuu » va chu, va huu
va cau » van cau, va cac, va dau

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 ky dang xa hoi. hieu ((viec bach) or (vien bach)) xuc va thanh ((va cuu) OR (va cau)) tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky dang xa hoi. hieu ((viec bach) OR (vien bach)) xuc va thanh ((va cuu) OR (va cau)) tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ky dang xa hoi. hieu ((viec bach) or (vien bach)) xuc va thanh ((va cuu) OR (va cau)) tre".
• Adding a wildcard symbol may retrieve word variants: tu sach ky dang xa hoi. hieu ((viec bach) or (vien bach)) xuc va thanh ((va cuu) OR (va cau)) tre*.