Perhaps you should try some spelling variations:
thien van » thi van
toc sach » hoc sach, doc sach, thuoc sach
ban hang » ngan hang
ky lang » ky tang, tay lang
ky dang » ky danh
van cam » van nam, van lam, van cau
xuc ban » duc ban, cuc ban, quoc ban
hang vi » hang va, hanh vi, hang di
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: toc sach ((((ky lang) OR (ky nang))) or (ky dang)) xa hoi. thien van cam xuc ban hang vi cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc sach ((((ky lang) OR (ky nang))) OR (ky dang)) xa hoi. thien van cam xuc ban hang vi cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "toc sach ((((ky lang) OR (ky nang))) or (ky dang)) xa hoi. thien van cam xuc ban hang vi cua te".
• Adding a wildcard symbol may retrieve word variants: toc sach ((((ky lang) OR (ky nang))) or (ky dang)) xa hoi. thien van cam xuc ban hang vi cua te*.