Perhaps you should try some spelling variations:
hoc thieu » toc thieu, hoc hien
nghia cua » nghiep cua, nghia xa, nghia duy
nghi cua » nghe cua, ngai cua, nghiep cua
tu sach » thu sach, su sach, te sach
nha hoc » nha thuoc, khoa hoc, nha nuoc
bo soc » bo oc, bo uoc
bo so » co so, ho so, bo ho

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 nha hoc thieu ((nghi cua) OR (nghia cua)) ets : nhung ((bo so) or (bo soc)) vi đai~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach nha hoc thieu ((nghi cua) OR (nghia cua)) ets : nhung ((bo so) OR (bo soc)) vi đai.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach nha hoc thieu ((nghi cua) OR (nghia cua)) ets : nhung ((bo so) or (bo soc)) vi đai".
• Adding a wildcard symbol may retrieve word variants: tu sach nha hoc thieu ((nghi cua) OR (nghia cua)) ets : nhung ((bo so) or (bo soc)) vi đai*.