Perhaps you should try some spelling variations:
dan thanh » dang thanh, danh thanh, ban thanh
pham thuc » phap thuc, pham chuc, nham thuc
sach kem » hanh kem
thanh di » thanh doi, thanh de, thanh do
thuc dan » thuc hanh, hoc dan, thuc vat
cao hoc » co hoc, cho hoc, chat hoc
hieu ve » hieu va, hieu van
ve pham » vi pham, v pham, ve phan
cao hoi » cau hoi, co hoi, tao hoi
di cua » dai cua, doi cua, de cua
cua te » cua tu

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

• Performing a fuzzy search may retrieve terms with similar spellings: thu ((sach kem) or (sach y)) nang ((cao hoi) OR (cao hoc)). hieu ve pham thuc dan thanh di cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu ((sach kem) OR (sach y)) nang ((cao hoi) OR (cao hoc)). hieu ve pham thuc dan thanh di cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu ((sach kem) or (sach y)) nang ((cao hoi) OR (cao hoc)). hieu ve pham thuc dan thanh di cua te".
• Adding a wildcard symbol may retrieve word variants: thu ((sach kem) or (sach y)) nang ((cao hoi) OR (cao hoc)). hieu ve pham thuc dan thanh di cua te*.