Perhaps you should try some spelling variations:
sanh tri » thanh tri, dinh tri, minh tri
tue cach » tu cach, thuc cach, ve cach
he trong » he thong, he trung, le trong
sinh tai » sinh thai, hinh tai, sinh dai
thi bach » thi bich, thi hanh, thi anh
so sanh » do sanh
tai thi » tai chi
bach ha » bac ha, bich ha, sach ha
ha he » ha le, va he

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

• Performing a fuzzy search may retrieve terms with similar spellings: (( so sanh tri ((tue cach) or (thuc hanh)) hoa he trong ) or ( hoc sinh tai thi bach ha he trong ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( so sanh tri ((tue cach) OR (thuc hanh)) hoa he trong ) OR ( hoc sinh tai thi bach ha he trong )).
• Adding a wildcard symbol may retrieve word variants: (( so sanh tri ((tue cach) or (thuc hanh)) hoa he trong ) or ( hoc sinh tai thi bach ha he trong ))*.