Perhaps you should try some spelling variations:
thanh le » thinh le, thanh ve, thanh de
thuc ban » thuoc ban, thuc dan, thu ban
su sach » so sach, vu sach
sach ty » sach y, sach tu, sach thu
tuc ban » truc ban, tu ban, tuc dan
hieu va » lieu va, hieu qua
hieu ve » hieu van
hang ha » hang hoa, hang hai, hoang ha
ty hang » ly hang, ty xang, thi hang
ha hoi » hoa hoi, ha noi, xa hoi
le cua » ly 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 ty hang ha hoi. ((hieu ve) OR (hieu va)) cam ((tuc ban) or (thuc ban)) thanh le cua vat~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ty hang ha hoi. ((hieu ve) OR (hieu va)) cam ((tuc ban) OR (thuc ban)) thanh le cua vat.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ty hang ha hoi. ((hieu ve) OR (hieu va)) cam ((tuc ban) or (thuc ban)) thanh le cua vat".
• Adding a wildcard symbol may retrieve word variants: su sach ty hang ha hoi. ((hieu ve) OR (hieu va)) cam ((tuc ban) or (thuc ban)) thanh le cua vat*.