Perhaps you should try some spelling variations:
nghien cac » nghiep cach, nghien cuu, nghiep cay
hoa nhanh » hoc nhanh, hoa thanh, hoa khanh
chong doc » chong dich, hong duc, cuong do
gian lang » gian dan
sach hoc » cach hoc, sach hoi, mach hoc
cac cong » cua cong
cong hoa » dong hoa, dong hoc, hang hoa
chon loc » cho hoc
su sach » so sach, vu sach
ca gian » ca giang, ca giao, va gian
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: su sach hoc tap, nghien cac cong hoa nhanh ((chong doc) OR (chon loc)) xa hoi ca gian lang~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach hoc tap, nghien cac cong hoa nhanh ((chong doc) OR (chon loc)) xa hoi ca gian lang".
• Adding a wildcard symbol may retrieve word variants: su sach hoc tap, nghien cac cong hoa nhanh ((chong doc) OR (chon loc)) xa hoi ca gian lang*.