Perhaps you should try some spelling variations:
toc sach » hoc sach, thuoc sach, nuoc sach
va thanh » gia thanh, ban thanh, va tinh
doc sach » hoc sach, nuoc sach, dac sac
ban hang » ngan hang
vai cua » dai cua, hai cua, lai cua
hieu ve » hieu va, hieu van
dang xa » dang xay, lang xa, dang ha
ky dang » ky nang, ky danh
ve cam » ve cham, ve cac, va cam
cua tu » cua tuc, cua su, cua cu

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) OR (doc sach)) ky dang xa hoi. hieu ve cam xuc ((va thanh) or (ban hang)) vai cua tu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((toc sach) OR (doc sach)) ky dang xa hoi. hieu ve cam xuc ((va thanh) OR (ban hang)) vai cua tu.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((toc sach) OR (doc sach)) ky dang xa hoi. hieu ve cam xuc ((va thanh) or (ban hang)) vai cua tu".
• Adding a wildcard symbol may retrieve word variants: ((toc sach) OR (doc sach)) ky dang xa hoi. hieu ve cam xuc ((va thanh) or (ban hang)) vai cua tu*.