Perhaps you should try some spelling variations:
nhanh chuong » nhanh chong, thanh chuong, thanh huong
chuong hoc » chung hoc, thuong hoc, truong hoc
cach thoi » cac thoi, cach thuc, cach noi
hoa nhanh » hoc nhanh, hoa thanh, hoa khanh
thoi dai » hoc dai, hoi dap, hoi dan
cuu cong » cua cong, thu cong, cac cong
cong hoa » dong hoa, dong hoc, hang hoa
nhan tai » hang tai, van tai, toan tai
tu cach » tu cac
hai tan » hai van, hai quan
nhan va » nhan dan, nhan tao, phan van
ma hai » ta hai, va hai, xa hai

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 dai, nghien cuu cong hoa nhanh chuong hoc ma hai tan ((nhan va) or (nhan tai))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu cach thoi dai, nghien cuu cong hoa nhanh chuong hoc ma hai tan ((nhan va) OR (nhan tai)).
• Adding a wildcard symbol may retrieve word variants: tu cach thoi dai, nghien cuu cong hoa nhanh chuong hoc ma hai tan ((nhan va) or (nhan tai))*.