Perhaps you should try some spelling variations:
hang khoa » dung khoa
cuu tong » cuu cong, cuu tinh, huu tung
tong hoc » tuong hoc, thong hoc, trong hoc
hoc hang » hoc hanh, hoc bang, hoc tang
khoa hoc » hoa hoc
van gian » van giang, dan gian, van giao
tu manh » tu minh, tu hanh, vu manh
manh ho » manh hon, minh hoa, danh hoa
va gian » va gianh, va giai, va gia
ho tap » hoc tap, ho hap, ho tai
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: tu manh ho tap, nghien cuu tong hoc hang khoa hoc xa hoi ((va gian) OR (van gian)) dan~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu manh ho tap, nghien cuu tong hoc hang khoa hoc xa hoi ((va gian) OR (van gian)) dan".
• Adding a wildcard symbol may retrieve word variants: tu manh ho tap, nghien cuu tong hoc hang khoa hoc xa hoi ((va gian) OR (van gian)) dan*.