Perhaps you should try some spelling variations:
thuoc doanh » thuoc dang, thuoc dong, thuoc thanh
doanh khoa » toan khoa
cat luong » chat luong, chat long, dai luong
sach hoc » cach hoc, sach hoi, mach hoc
cu luong » huy luong, do luong, cu luan
khoa hoc » hoa hoc
su sach » so sach, vu sach
va pham » van pham, va phat, va phap
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: su sach hoc tap, nghien ((cu luong) or (cat luong)) thuoc doanh khoa hoc xa hoi va pham van~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach hoc tap, nghien ((cu luong) OR (cat luong)) thuoc doanh khoa hoc xa hoi va pham van.
• Adding a wildcard symbol may retrieve word variants: su sach hoc tap, nghien ((cu luong) or (cat luong)) thuoc doanh khoa hoc xa hoi va pham van*.