Perhaps you should try some spelling variations:
cach thoi » cac thoi, cach thuc, cach noi
hoc nhanh » hoc phan
thoi tap » toi tap, hoc tap, thoi dai
cuu cong » cua cong, thu cong, cac cong
thuoc ma » hoc ma, duoc ma
phap van » pham van, phan van, phap han
tu cach » tu cac
va phap » va phat, ban phap
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 cach thoi tap, nghien cuu cong ((hoc nganh) or (hoc nhanh)) dung thuoc ma hoi va phap van~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu cach thoi tap, nghien cuu cong ((hoc nganh) OR (hoc nhanh)) dung thuoc ma hoi va phap van.
• Adding a wildcard symbol may retrieve word variants: tu cach thoi tap, nghien cuu cong ((hoc nganh) or (hoc nhanh)) dung thuoc ma hoi va phap van*.