Perhaps you should try some spelling variations:
hoach toan » hach toan
sach tren » sach tien, sach tranh
le trong » le trung, ly trong, le tang
dinh tri » chinh tri
tren thi » trien thi, tran thi, trieu thi
minh tri » chinh tri, minh thu
ve hoach » ke hoach, ve cach, ve hanh
thi anh » thi hanh, thi thanh, thich anh
so sach » so sanh, bo sach, co sach
toan le » tuan le, toan ly, toan ke
anh ha » anh va, anh ta, anh ma
ha 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 ((dinh tri) or (minh tri)) ve hoach toan le trong ) or ( so sach tren thi anh ha le trong ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( so ((dinh tri) OR (minh tri)) ve hoach toan le trong ) OR ( so sach tren thi anh ha le trong )).
• Adding a wildcard symbol may retrieve word variants: (( so ((dinh tri) or (minh tri)) ve hoach toan le trong ) or ( so sach tren thi anh ha le trong ))*.