Perhaps you should try some spelling variations:
qua trinh » qua kinh
trinh van » trinh han, trinh quan, trinh toan
nam thuc » nam thuoc, am thuc, nam thu
thuc qua » thuc cua, thuc que, chuc quan
su triet » su viet, su tien, ve triet
tu sach » thu sach, su sach, te sach
ly hang » ly quang
hieu ve » hieu va, hieu van
ve nam » he nam, va nam, le nam
van su » dan su
x hoi » xa hoi, o hoi, x ho

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 ((ky nang) or (ly hang)) x hoi. hieu ve nam thuc qua trinh van su triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ((ky nang) OR (ly hang)) x hoi. hieu ve nam thuc qua trinh van su triet.
• Adding a wildcard symbol may retrieve word variants: tu sach ((ky nang) or (ly hang)) x hoi. hieu ve nam thuc qua trinh van su triet*.