Perhaps you should try some spelling variations:
nganh cong » nhanh chong, thanh cong
cong thuoc » cong thuc, dong thuoc, long thuoc
thuoc lai » thuoc tai, thuoc la, thuoc sai
thu sach » tu sach, thuat sach, thuoc sach
sach hoi » sach doi, sach moi, cach thoi
dong hoc » dong co, dong luc
gian dan » gian lang
mon hoc » toan hoc
lai hoi » dai hoi, lai hoa, lai roi
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: thu sach hoi dap, nghien cuu ((mon hoc) OR (dong hoc)) nganh cong thuoc lai hoi ca gian dan~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu sach hoi dap, nghien cuu ((mon hoc) OR (dong hoc)) nganh cong thuoc lai hoi ca gian dan*".