Perhaps you should try some spelling variations:
sang mai » sang ma, sang tai, lang mai
ban hanh » ban hang
tu sach » thu sach, su sach, te sach
ky sang » ky nang, ky dang, ky tang
mai hoi » mai khoi, dai hoi, lai hoi
hieu ve » hieu va, hieu van
ve cham » va cham, ve chat, vu cham
soc ban » hoc ban, coc ban, so ban
tu san » thu san, tu ban, tu can
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 (tu san)) ky sang mai hoi. hieu ve cham soc ban hanh vi cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (tu san)) ky sang mai hoi. hieu ve cham soc ban hanh vi cua te*.