Perhaps you should try some spelling variations:
thieu khi » thieu nhi, tien khi, hieu chi
hoc thieu » toc thieu, hoc hien
sach hoa » sach ha, sach hoi, cach hoan
bach hoa » bach khoa, bach ha, cach hoan
trung bo » truong bo, trung hoc, trung hoa
khi cua » chi cua, thai cua
oc vi » hoc vi, doc vi

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 hoa) or (bach hoa)) hoc thieu khi cua ets : ((trung bo) or (nhung bai)) oc vi đai~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((sach hoa) OR (bach hoa)) hoc thieu khi cua ets : ((trung bo) OR (nhung bai)) oc vi đai.
• Adding a wildcard symbol may retrieve word variants: tu ((sach hoa) or (bach hoa)) hoc thieu khi cua ets : ((trung bo) or (nhung bai)) oc vi đai*.