Perhaps you should try some spelling variations:
hach tich » mach tich, thanh tich, hoc tich
minh tich » minh tinh, tinh thich, mach tich
thi minh » chi minh, thi hanh, thi bich
don gian » dan gian
tu hach » tu hanh, tu cach, tu sach
tich su » lich su, tich du, tinh su
tich so » tich bao, tinh son

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

• Performing a fuzzy search may retrieve terms with similar spellings: (( tu hach tich su - hoc cao ) or ( thi minh tich so - don gian ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( tu hach tich su - hoc cao ) OR ( thi minh tich so - don gian ))*.