Perhaps you should try some spelling variations:
nganh cong » nhanh chong, thanh cong
cong thuoc » cong thuc, dong thuoc, long thuoc
hoc nganh » hoc nhanh
thu sach » tu sach, thuat sach, thuoc sach
sach hoi » sach doi, sach moi, cach thoi
gian dan » gian lang
hoi tap » hoi dap, hoc tap, hoi tai
cuu mon » cuu mo, cuu mot, cuu cong
mon hoc » toan hoc, dong hoc
ca gian » ca giang, ca giao, va gian
la hoi » lai hoi, xa hoi, va hoi

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 tap, nghien cuu mon hoc nganh cong thuoc ((la hoi) OR (le hoi)) ca gian dan~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu sach hoi tap, nghien cuu mon hoc nganh cong thuoc ((la hoi) OR (le hoi)) ca gian dan*".