Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
va thanh » gia thanh, ban thanh, va tinh
hieu van » hieu va, thien van, lieu va
nam thuc » nam thuoc, am thuc, nam thu
cao nang » cao dang, cam nang, cao tang
va hanh » van hanh, va danh, ban hanh
ho nang » thi nang, kha nang
tu sach » thu sach, su sach, te sach
di cua » dai cua, doi cua, de cua
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 ((ho nang) OR (cao nang)) x hoi. hieu van nam thuc ((va hanh) or (va thanh)) di cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ((ho nang) OR (cao nang)) x hoi. hieu van nam thuc ((va hanh) OR (va thanh)) di cua triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ((ho nang) OR (cao nang)) x hoi. hieu van nam thuc ((va hanh) or (va thanh)) di cua triet".
• Adding a wildcard symbol may retrieve word variants: tu sach ((ho nang) OR (cao nang)) x hoi. hieu van nam thuc ((va hanh) or (va thanh)) di cua triet*.