Perhaps you should try some spelling variations:
ngan khong » nganh khong, nhan khong, ngan hang
cach thoi » cac thoi, cach thuc, cach noi
khong hoc » khung hoc, thong hoc, khong thuoc
thu cach » thuc cach, thu canh, tu cach
thoi dai » hoc dai, hoi dap, hoi dan
cuu long » cuu cong, cuu tong, cuu nang
long cuc » long cua, tong cuc, luong cuoc
cuc ngan » cua ngan, cac ngan, luc ngan
nhan tao » nhan tai, nhan dan
nhan va » nhan tai, nhan dan, phan 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: thu cach thoi dai, nghien cuu long cuc ngan khong hoc ma hoi va ((nhan va) OR (nhan tao))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu cach thoi dai, nghien cuu long cuc ngan khong hoc ma hoi va ((nhan va) OR (nhan tao))".
• Adding a wildcard symbol may retrieve word variants: thu cach thoi dai, nghien cuu long cuc ngan khong hoc ma hoi va ((nhan va) OR (nhan tao))*.