Perhaps you should try some spelling variations:
nganh khung » nganh khong, nhanh hung
thuat sach » thuat lanh, thuat san
hoc nganh » hoc nhanh
khung hoc » chung hoc, nhung hoc, thuong hoc
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 » thu sach, su sach, te sach
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 (thuat sach)) hoc tap, nghien cuu tuan hoc nganh khung hoc bai khoi va nhan va~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (thuat 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 (thuat sach)) hoc tap, nghien cuu tuan hoc nganh khung hoc bai khoi va nhan va*.