Perhaps you should try some spelling variations:
su triet » su viet, su tien, ve triet
nam thuc » nam thuoc, am thuc, nam thu
hanh tai » thanh tai, hang tai, han tai
hanh vai » hanh vi, hanh va, hanh van
thi hanh » thi thanh
thuc va » thuc vat, thuc dan, thuc day
tu sach » thu sach, te sach, tu cach
hieu le » hieu ve, hieu he, hieu ly
hanh xa » hanh va, hanh ma, hanh xu
su sach » so sach, vu sach
le nam » ly nam, he nam, le na

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((tu sach) or (su sach)) thi hanh xa hoi. hieu le nam thuc va ((hanh vai) or (hanh tai)) su triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (su sach)) thi hanh xa hoi. hieu le nam thuc va ((hanh vai) OR (hanh tai)) su triet.
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (su sach)) thi hanh xa hoi. hieu le nam thuc va ((hanh vai) or (hanh tai)) su triet*.