Perhaps you should try some spelling variations:
cham tuc » nham thuc, pham thuc, tham thuc
thinh le » trinh ly
dang van » hoang van, hang va
tang van » hoang van, trong van, tang luan
thanh le » thanh ve, thanh de, thanh liem
tu sach » thu sach, su sach, te sach
tuc ban » thuc ban, truc ban, tu ban
ve cham » va cham, ve chat, vu cham
sach ty » sach y, sach tu, sach thu
hieu ve » hieu va, hieu van

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 ty ((dang van) or (tang van)) hoi. hieu ve cham tuc ban ((thanh le) OR (thinh le)) cua vat~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ty ((dang van) OR (tang van)) hoi. hieu ve cham tuc ban ((thanh le) OR (thinh le)) cua vat.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ty ((dang van) or (tang van)) hoi. hieu ve cham tuc ban ((thanh le) OR (thinh le)) cua vat".
• Adding a wildcard symbol may retrieve word variants: tu sach ty ((dang van) or (tang van)) hoi. hieu ve cham tuc ban ((thanh le) OR (thinh le)) cua vat*.