Perhaps you should try some spelling variations:
cac khanh » cac thanh, cach nhanh, khac khanh
khanh hoa » thanh hoa, hang hoa
thu cach » thuc cach, thu canh, tu cach
cach hoc » cach thuc, cach thoi, dich hoc
cuu cong » cua cong, thu cong, cac cong
cong cac » cuong cac, cong tac, cong cau
van nhan » van phan, van thanh, danh nhan
va nhan » ca nhan, va phan, va nha
hoc xa » hoc ma

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 hoc tap, nghien cuu cong cac khanh hoa hoc xa hoi ((va nhan) OR (van nhan)) va~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu cach hoc tap, nghien cuu cong cac khanh hoa hoc xa hoi ((va nhan) OR (van nhan)) va".
• Adding a wildcard symbol may retrieve word variants: thu cach hoc tap, nghien cuu cong cac khanh hoa hoc xa hoi ((va nhan) OR (van nhan)) va*.