Perhaps you should try some spelling variations:
thanh vi » hanh vi, thanh va, thanh ve
su sach » vu sach
luc bat » suc bat, luc nhat, luat bat
luc ban » duc ban, cuc ban, luc van
ve chat » va chat, van chat
hieu ve » hieu va, hieu van
dang ma » dang mau, dang mam, dang mat
ky dang » ky nang, ky danh
so sach » so sanh, bo sach, co sach
ma hoi » mai hoi, xa hoi, ma hoa
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) OR (so sach)) ky dang ma hoi. hieu ve chat ((luc ban) or (luc bat)) thanh vi cua vat~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((su sach) OR (so sach)) ky dang ma hoi. hieu ve chat ((luc ban) OR (luc bat)) thanh vi cua vat.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((su sach) OR (so sach)) ky dang ma hoi. hieu ve chat ((luc ban) or (luc bat)) thanh vi cua vat".
• Adding a wildcard symbol may retrieve word variants: ((su sach) OR (so sach)) ky dang ma hoi. hieu ve chat ((luc ban) or (luc bat)) thanh vi cua vat*.