Perhaps you should try some spelling variations:
trinh van » trinh han, trinh quan, trinh toan
qua trinh » qua kinh
su triet » su viet, su tien, ve triet
toc sach » hoc sach, doc sach, thuoc sach
thuc qua » thuc cua, thuc que, chuc quan
nam thuc » nam thuoc, am thuc, nam thu
hieu ve » hieu va, hieu van
ty nang » ky nang, ty xang, ly nang
ty hang » ly hang, ty xang, thi hang
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: ((te sach) or (toc sach)) ((ty nang) or (ty 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: ((te sach) OR (toc sach)) ((ty nang) OR (ty hang)) x hoi. hieu ve nam thuc qua trinh van su triet.
• Adding a wildcard symbol may retrieve word variants: ((te sach) or (toc sach)) ((ty nang) or (ty hang)) x hoi. hieu ve nam thuc qua trinh van su triet*.