Perhaps you should try some spelling variations:
thuat sach » thuat lanh, thuat san
nganh cong » nhanh chong, thanh cong
cong thuoc » cong thuc, dong thuoc, long thuoc
hoc nganh » hoc nhanh
thu sach » tu sach, thuoc sach, thu hoach
thuoc la » thuoc ma, thuoc va, thuoc tai
gian dan » gian lang
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, le hoi
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) OR (thuat sach)) hoi dap, nghien cuu mon hoc nganh cong thuoc la hoi ca gian dan~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((thu sach) OR (thuat sach)) hoi dap, nghien cuu mon hoc nganh cong thuoc la hoi ca gian dan*".