Perhaps you should try some spelling variations:
ban tinh » ban thanh, quan tinh, ban hanh
vu khanh » vu thanh, van khanh, duy khanh
tu sach » thu sach, su sach, tu cach
tinh vi » trinh vi, tinh voi, tinh va
cac ban » cac dan, cac van, can ban
ve cham » va cham, ve chat, vu cham
dang ha » dong ha, dung ha, lang ha
ky dang » ky nang, ky danh
te sach » toc sach
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) or (te sach)) ky dang ha noi. hieu ((ve cham) or (vu khanh)) cac ban tinh vi cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (te sach)) ky dang ha noi. hieu ((ve cham) OR (vu khanh)) cac ban tinh vi cua te.
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (te sach)) ky dang ha noi. hieu ((ve cham) or (vu khanh)) cac ban tinh vi cua te*.