Perhaps you should try some spelling variations:
trong hoc » truong hoc, tuong hoc, thong hoc
khanh hoa » thanh hoa, hang hoa
mach hoc » cach hoc, dich hoc, anh hoc
tong hoc » tuong hoc, thong hoc, tong hop
khoa cau » khoa chau, khoa cam, hoa cau
cau phan » chau phan, cuu phan, cac phan
phan dau » phan tu, hang dau
te mach » ke mach, te sach, tim mach
hoc da » hoc dan, hoc dai, hoc dat

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: te mach hoc tap, nghien cuu ((tong hoc) OR (trong hoc)) khanh hoa hoc da khoa cau phan dau~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te mach hoc tap, nghien cuu ((tong hoc) OR (trong hoc)) khanh hoa hoc da khoa cau phan dau".
• Adding a wildcard symbol may retrieve word variants: te mach hoc tap, nghien cuu ((tong hoc) OR (trong hoc)) khanh hoa hoc da khoa cau phan dau*.