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
cuu tong » cuu cong, cuu tinh, huu tung
tong hoc » tuong hoc, thong hoc, trong hoc
thuoc ma » hoc ma, duoc ma
tu sach » thu sach, su sach, te sach
hoi tap » hoi dap, hoi tai, hai tap
va phap » va phat, ban phap
phap va » phap vat, pham va, pham van
ma hoi » mai hoi, xa hoi, ma hoa

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: tu sach ((hoi tap) or (hoc tap)), nghien cuu tong hoc nganh cong thuoc ma hoi va phap va~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ((hoi tap) OR (hoc tap)), nghien cuu tong hoc nganh cong thuoc ma hoi va phap va.
• Adding a wildcard symbol may retrieve word variants: tu sach ((hoi tap) or (hoc tap)), nghien cuu tong hoc nganh cong thuoc ma hoi va phap va*.