Perhaps you should try some spelling variations:
hoc thieu » toc thieu, hoc hien
nghia cua » nghiep cua, nghia xa, nghia duy
ngai cua » ngan cua, nghi cua, nguoi cua
tu sach » thu sach, su sach, te sach
nha hoc » nha thuoc, khoa hoc, nha nuoc
bai hop » bai hoc, bai choi
hop vat » hoc vat, hop va, hoa vat

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 ((ngai cua) or (nghia cua)) ets : nhung bai hop vat đai~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach nha hoc thieu ((ngai cua) OR (nghia cua)) ets : nhung bai hop vat đai*.