Perhaps you should try some spelling variations:
cac khoa » cac khoan, cac khoi, dac khoa
khoa toc » khoa hoc, hoa toc, khoa thuoc
toc hieu » toc thieu, doc hieu, hoc thieu
hieu chi » hieu cac, hieu moi
nhung bo » nhung bi, nhung bai, nhung don
hoc cac » hoc cao
chi cua » chi cuc, khi cua, cuoi cua
hon vi » chon vi, hon ai, hon va

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc cac khoa toc hieu chi cua ets : nhung bo ((hon vi) OR (don vi)) đai~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc cac khoa toc hieu chi cua ets : nhung bo ((hon vi) OR (don vi)) đai".
• Adding a wildcard symbol may retrieve word variants: hoc cac khoa toc hieu chi cua ets : nhung bo ((hon vi) OR (don vi)) đai*.