Perhaps you should try some spelling variations:
thanh khong » thanh hong, thinh khong, thanh chuong
nghien thu » nghiem thuc, nghiep thuc, nghien cuu
hoa thanh » hoan thanh, ha thanh, hoc thanh
khong hoc » khung hoc, thong hoc, khong thuoc
thu sach » tu sach, thuat sach, thuoc sach
cong hoa » dong hoa, dong hoc, hang hoa
nhan van » nhan dan, nhan va, phan van
te sach » toc sach
va nhan » van nhan, ca nhan, va phan
hoc xa » hoc ma

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((te sach) or (thu sach)) hoc tap, nghien thu cong hoa thanh khong hoc xa hoi va nhan van~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((te sach) OR (thu sach)) hoc tap, nghien thu cong hoa thanh khong hoc xa hoi va nhan van.
• Adding a wildcard symbol may retrieve word variants: ((te sach) or (thu sach)) hoc tap, nghien thu cong hoa thanh khong hoc xa hoi va nhan van*.