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