Perhaps you should try some spelling variations:
hoc nhanh » hoc phan
tuan pham » thanh pham, san pham, tac pham
sach hoi » sach doi, sach moi, cach thoi
cuu dong » cuu cong, cuu tong, cuu long
khoa hoc » hoa hoc
hai tuan » khai tuan, hai quan, hai tan
tu sach » thu sach, su sach, te sach
hoi tap » hoi dap, hoc tap, hoi tai
ma hai » ta hai, va hai, xa hai

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 hoi tap, nghien cuu dong ((hoc nhanh) OR (hoc nganh)) khoa hoc ma hai tuan pham van~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach hoi tap, nghien cuu dong ((hoc nhanh) OR (hoc nganh)) khoa hoc ma hai tuan pham van".
• Adding a wildcard symbol may retrieve word variants: tu sach hoi tap, nghien cuu dong ((hoc nhanh) OR (hoc nganh)) khoa hoc ma hai tuan pham van*.