Perhaps you should try some spelling variations:
thu dang » thu bang, thu dong, thu sang
thanh de » hanh de, thanh ve, thanh do
thu hang » thi hang, thuc hanh, thu huong
thanh le » thinh le, thanh ve, thanh liem
tu sach » thu sach, su sach, te sach
tuc ban » thuc ban, truc ban, tu ban
hieu va » lieu va, hieu qua
cao tuc » dao tuc, cao duc, cao suc
xay hoi » xa hoi, tay hoi, cay phoi
va cao » va cac, va co, va dao

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu sach ((thu dang) OR (thu hang)) xay hoi. hieu va cao tuc ban ((thanh le) or (thanh de)) cua vat~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ((thu dang) OR (thu hang)) xay hoi. hieu va cao tuc ban ((thanh le) OR (thanh de)) cua vat.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ((thu dang) OR (thu hang)) xay hoi. hieu va cao tuc ban ((thanh le) or (thanh de)) cua vat".
• Adding a wildcard symbol may retrieve word variants: tu sach ((thu dang) OR (thu hang)) xay hoi. hieu va cao tuc ban ((thanh le) or (thanh de)) cua vat*.