Perhaps you should try some spelling variations:
sanh tri » thanh tri, dinh tri, minh tri
tue cach » tu cach, thuc cach, cuu cach
sach tri » sach tai, sach tren, sach truc
tai hanh » tai thanh, tai nhanh, thi hanh
so sanh » do sanh
ve cach » va cach, ve cac, ve canh
so sach » bo sach, co sach, hoc sach
tri tai » trinh tai
hanh va » hang va, hanh vi
hoc he » hoc hien
va he » va che, va ghe, va de

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 (ve cach)) hoc he thong ) or ( so sach tri tai hanh va he thong ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( so sanh tri ((tue cach) OR (ve cach)) hoc he thong ) OR ( so sach tri tai hanh va he thong )).
• Adding a wildcard symbol may retrieve word variants: (( so sanh tri ((tue cach) or (ve cach)) hoc he thong ) or ( so sach tri tai hanh va he thong ))*.