Perhaps you should try some spelling variations:
cach thoi » cac thoi, cach thuc, cach noi
hoa thanh » hoan thanh, ha thanh, hoc thanh
thoi tap » toi tap, hoc tap, thoi dai
cuu cong » cua cong, thu cong, cac cong
cong hoa » dong hoa, dong hoc, hang hoa
dan nhan » danh nhan, dan chan, van nhan
tu cach » tu cac
nhan va » nhan tai, nhan dan, nhan tao
ma hoi » mai hoi, xa hoi, me hoi

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 hoa thanh cong hoa ((ma hoi) or (ma hoa)) dan nhan va~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu cach thoi tap, nghien cuu cong hoa thanh cong hoa ((ma hoi) OR (ma hoa)) dan nhan va.
• Adding a wildcard symbol may retrieve word variants: tu cach thoi tap, nghien cuu cong hoa thanh cong hoa ((ma hoi) or (ma hoa)) dan nhan va*.