Perhaps you should try some spelling variations:
sach kem » hanh kem
hanh dao » lanh dao, thanh dat, thanh dam
ban hanh » ban hang
chan ban » can ban, chat ban, chan nan
cam chan » cam nhan, dan chan
cao hoc » co hoc, cho hoc, chat hoc
hieu ve » hieu va, hieu van
cao hoi » cau hoi, co hoi, tao hoi
dao cuu » dao huu, dao cau, dao chu
cuu tre » cua tre, cau tren, cau treo
ve cam » ve cham, ve cac, va cam

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 cam chan ban hanh dao cuu tre~.
• 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 cam chan ban hanh dao cuu tre.
• Adding a wildcard symbol may retrieve word variants: thu ((sach kem) or (sach y)) nang ((cao hoi) or (cao hoc)). hieu ve cam chan ban hanh dao cuu tre*.