Perhaps you should try some spelling variations:
cua triet » su triet, va triet
thanh van » thanh san, thanh toan, thanh phan
van thanh » ban thanh, van tuan
cua viet » ca viet, hoa viet, cua vat
vuc van » duc van, luc van, thuc van
tu sach » thu sach, su sach, te sach
cac vuc » cac nuoc, cac vung, cac cuoc
hieu va » lieu va, hieu qua
y nang » ky nang, ly nang, may nang
ma hoi » mai hoi, xa hoi, ma hoa
v nang » va nang, vu nang, van nang

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 ((y nang) or (v nang)) ma hoi. hieu va cac vuc van thanh van ((cua triet) OR (cua viet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ((y nang) OR (v nang)) ma hoi. hieu va cac vuc van thanh van ((cua triet) OR (cua viet))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ((y nang) or (v nang)) ma hoi. hieu va cac vuc van thanh van ((cua triet) OR (cua viet))*".