Perhaps you should try some spelling variations:
hoc thieu » toc thieu, hoc hien
thieu khi » thieu nhi, tien khi, hieu chi
nhung con » nhung cong, nhung don, nhung mon
nhung co » nhung bo, chung co, khung co
cach hoi » cach thoi, cach noi, cach hoc
tu cach » tu cac
hoi hoc » hoa hoc, khoa hoc, hoi chuc
khi cua » chi cua, thai cua
doi vai » doi voi, doi bai, doi tai
doi va » hoi va, noi va, dai va

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu cach hoi hoc thieu khi cua ets : ((nhung co) or (nhung con)) ((doi vai) or (doi va)) đai~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu cach hoi hoc thieu khi cua ets : ((nhung co) OR (nhung con)) ((doi vai) OR (doi va)) đai.
• Adding a wildcard symbol may retrieve word variants: tu cach hoi hoc thieu khi cua ets : ((nhung co) or (nhung con)) ((doi vai) or (doi va)) đai*.