Perhaps you should try some spelling variations:
nganh khung » nganh khong, nhanh hung
hoc nganh » hoc nhanh
khung hoc » chung hoc, nhung hoc, thuong hoc
thu sach » thuat sach, thuoc sach, thu hoach
cuu tuan » huu tuan, chu tuan, cuu toan
tuan hoc » toan hoc, luan hoc, than hoc
bai khoi » bai choi, mai khoi, tai khoi
tu sach » su sach, te sach, tu cach
hoc bai » hoc dai, hoc giai
khoi va » hoi va, khi va, choi va
va nhan » van nhan, ca nhan, va phan
nhan va » nhan tai, nhan dan, nhan tao

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) OR (thu sach)) hoc tap, nghien cuu tuan hoc nganh khung hoc bai khoi va nhan va~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sach) OR (thu sach)) hoc tap, nghien cuu tuan hoc nganh khung hoc bai khoi va nhan va".
• Adding a wildcard symbol may retrieve word variants: ((tu sach) OR (thu sach)) hoc tap, nghien cuu tuan hoc nganh khung hoc bai khoi va nhan va*.