Perhaps you should try some spelling variations:
sach thu » sach thue, sach thieu, sach tham
thu nang » thi nang, thu hang, thu bang
ban hanh » ban hang
cua viet » ca viet, hoa viet, cua vat
su sach » so sach, vu sach
hieu ve » hieu va, hieu van
va hanh » van hanh, va thanh, va danh
vi cua » vai cua, di cua

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: su sach thu nang x ho. ((hieu ve) or (hieu qua)) cam xuc ((va hanh) or (ban hanh)) vi cua viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach thu nang x ho. ((hieu ve) OR (hieu qua)) cam xuc ((va hanh) OR (ban hanh)) vi cua viet.
• Adding a wildcard symbol may retrieve word variants: su sach thu nang x ho. ((hieu ve) or (hieu qua)) cam xuc ((va hanh) or (ban hanh)) vi cua viet*.