Perhaps you should try some spelling variations:
thuat sach » thuat lanh, thuat san
hoc nhanh » hoc nganh, hoc phan
khung hoc » nhung hoc, thuong hoc, trung hoc
chung hoc » trung hoc, dung hoc, hung hoa
sach hoc » cach hoc, sach hoi, mach hoc
cuu cong » cua cong, thu cong, cac cong
cong hoc » dong hoc, cong hoa, cong coc
dan nhan » danh nhan, dan chan, van nhan
nhan van » nhan dan, nhan va, phan van
mai hoi » mai khoi, dai hoi, lai hoi
hoi dan » hoa dan, hoc dan, hoi dap

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

• Performing a fuzzy search may retrieve terms with similar spellings: thuat sach hoc tap, nghien cuu cong hoc nhanh ((khung hoc) OR (chung hoc)) mai hoi dan nhan van~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thuat sach hoc tap, nghien cuu cong hoc nhanh ((khung hoc) OR (chung hoc)) mai hoi dan nhan van*".