Perhaps you should try some spelling variations:
cua triet » cua viet, su triet
va triet » va thiet, va trien, ve triet
day hanh » day nhanh, day thanh, dao hanh
thuc day » thuc dan, thuc vat
hieu van » hieu va, thien van, lieu va
nam thuc » nam thuoc, am thuc, nam thu
dang xa » dang xay, lang xa, dang ha
ky dang » ky nang, ky danh
te sach » toc sach
hanh va » hang va, hanh vi
tu sach » thu sach, su sach, tu cach

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 (te sach)) ky dang xa hoi. hieu van nam thuc day hanh va ((cua triet) or (va triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (te sach)) ky dang xa hoi. hieu van nam thuc day hanh va ((cua triet) OR (va triet)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sach) OR (te sach)) ky dang xa hoi. hieu van nam thuc day hanh va ((cua triet) or (va triet))".
• Adding a wildcard symbol may retrieve word variants: ((tu sach) OR (te sach)) ky dang xa hoi. hieu van nam thuc day hanh va ((cua triet) or (va triet))*.