Perhaps you should try some spelling variations:
nuoc sach » nguoi sach, hoc sach, cuoc cach
dang khoa » dung khoa, hang khoa, dang khoi
cuu cong » cua cong, thu cong, cac cong
cong hoc » dong hoc, cong hoa, cong coc
hoc dang » hoc dan, hoc dung, hoc bang
khoa hoc » hoa hoc
nhan van » nhan dan, nhan va, phan van
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: ((thu hoach) or (nuoc sach)) hoc tap, nghien cuu cong hoc dang khoa hoc xa hoi va nhan van~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((thu hoach) OR (nuoc sach)) hoc tap, nghien cuu cong hoc dang khoa hoc xa hoi va nhan van.
• Adding a wildcard symbol may retrieve word variants: ((thu hoach) or (nuoc sach)) hoc tap, nghien cuu cong hoc dang khoa hoc xa hoi va nhan van*.