Perhaps you should try some spelling variations:
hoc thieu » toc thieu, hoc hien
cach thoi » cac thoi, cach thuc, cach noi
cach hoc » cach thuc, dich hoc, cac hop
nhung co » nhung con, nhung bo, chung co
khi cua » thai cua
chi cua » chi cuc, cuoi cua, chat cua
dot va » dat va, do va, doi 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 hoc) OR (cach thoi)) hoc thieu ((khi cua) or (chi cua)) ets : nhung co dot va đai~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((cach hoc) OR (cach thoi)) hoc thieu ((khi cua) OR (chi cua)) ets : nhung co dot va đai.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu ((cach hoc) OR (cach thoi)) hoc thieu ((khi cua) or (chi cua)) ets : nhung co dot va đai".
• Adding a wildcard symbol may retrieve word variants: tu ((cach hoc) OR (cach thoi)) hoc thieu ((khi cua) or (chi cua)) ets : nhung co dot va đai*.