Perhaps you should try some spelling variations:
ban tinh » ban thanh, quan tinh, ban hanh
tu sach » thu sach, su sach, te sach
sach ky » sac ky, sach y, sach ty
tinh vi » trinh vi, tinh voi, tinh va
vu kham » vu khanh
ve chat » va chat, van chat
ve cham » va cham, vu cham, ve chim
dang xa » dang xay, lang xa, dang ha
ky dang » ky nang, ky danh
vi cua » vai cua, di cua
cua te » cua tu

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 ((((ve cham) OR (ve chat))) or (vu kham)) cua ban tinh vi cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky dang xa hoi. hieu ((((ve cham) OR (ve chat))) OR (vu kham)) cua ban tinh vi cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ky dang xa hoi. hieu ((((ve cham) OR (ve chat))) or (vu kham)) cua ban tinh vi cua te".
• Adding a wildcard symbol may retrieve word variants: tu sach ky dang xa hoi. hieu ((((ve cham) OR (ve chat))) or (vu kham)) cua ban tinh vi cua te*.