Perhaps you should try some spelling variations:
khong hoc » thong hoc, khong thuoc, khong chuc
khung hoc » chung hoc, nhung hoc, thuong hoc
dai khoi » dai hoi, dai khoa, mai khoi
sach hoi » sach doi, sach moi, cach thoi
phap dau » phan dau, phap day, pham dau
hoc phan » hoc dan, hoc pho
dong hoc » dong co, dong luc
cuu dong » cuu cong, cuu tong, cuu long
hoi tap » hoi dap, hoc tap, hoi tai
khoi va » hoi va, khi va, choi va
va phap » va phat, ban phap
te sach » toc sach

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

• Performing a fuzzy search may retrieve terms with similar spellings: te sach hoi tap, nghien cuu dong hoc phan ((khong hoc) OR (khung hoc)) dai khoi va phap dau~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach hoi tap, nghien cuu dong hoc phan ((khong hoc) OR (khung hoc)) dai khoi va phap dau".
• Adding a wildcard symbol may retrieve word variants: te sach hoi tap, nghien cuu dong hoc phan ((khong hoc) OR (khung hoc)) dai khoi va phap dau*.