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
sach hoc » cach hoc, sach hoi, mach hoc
cuu tuan » huu tuan, cuu toan, luu tuan
chu tuan » chu xuan, thu tuan, chu quang
tu sach » thu sach, su sach, te sach
ma choi » bai choi, dam choi, san choi
choi va » hoi va, chai va, cho 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 hoc tap, nghien ((cuu tuan) or (chu tuan)) hoc nganh khung hoc ma choi va nhan va~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach hoc tap, nghien ((cuu tuan) OR (chu tuan)) hoc nganh khung hoc ma choi va nhan va.
• Adding a wildcard symbol may retrieve word variants: tu sach hoc tap, nghien ((cuu tuan) or (chu tuan)) hoc nganh khung hoc ma choi va nhan va*.