Perhaps you should try some spelling variations:
hoa doanh » toan doanh, hoa dan
sach thu » sach thue, sach thieu, sach tham
cuu cong » cua cong, thu cong, cac cong
cong hoa » dong hoa, dong hoc, hang hoa
nhan tai » hang tai, van tai, toan tai
te sach » toc sach
thu tap » thu thap, thuc tap, thu tai
hoi ca » hoi cua, hoi cac, hoi cau

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 thu tap, nghien cuu cong hoa doanh ((khoa hoc) OR (hoa hoc)) xa hoi ca nhan tai~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach thu tap, nghien cuu cong hoa doanh ((khoa hoc) OR (hoa hoc)) xa hoi ca nhan tai".
• Adding a wildcard symbol may retrieve word variants: te sach thu tap, nghien cuu cong hoa doanh ((khoa hoc) OR (hoa hoc)) xa hoi ca nhan tai*.