Perhaps you should try some spelling variations:
cach hoan » cac khoan, hach toan, sach han
le trong » le trung, ly trong, le tang
sanh thi » anh thi, oanh thi, nhanh thi
minh tri » dinh tri, chinh tri, minh thu
he trong » he thong, he trung, ke trong
cach hoa » cach hoc, bach hoa, cach thoi
tri thuc » tri tue
so sanh » do sanh
thi thi » thi thai, thi thin, thi thu
thi anh » thi hanh, thi thanh, thich anh
so minh » so sinh, so tinh, do minh
anh ta » anh tu, anh va, anh tuan
ta le » tai le, tay le, va le

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

• Performing a fuzzy search may retrieve terms with similar spellings: (( so minh tri thuc ((cach hoa) or (cach hoan)) he trong ) or ( so sanh thi thi anh ta le trong ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( so minh tri thuc ((cach hoa) OR (cach hoan)) he trong ) OR ( so sanh thi thi anh ta le trong )).
• Adding a wildcard symbol may retrieve word variants: (( so minh tri thuc ((cach hoa) or (cach hoan)) he trong ) or ( so sanh thi thi anh ta le trong ))*.