Perhaps you should try some spelling variations:
su triet » su viet, su tien, ve triet
thuc day » thuc vat
hanh dai » hanh tai, hanh dao, vanh dai
thuc dan » thuc hanh, hoc dan, thuc vat
te sach » toc sach
thuc va » thuc vat
hieu ve » hieu va, hieu van
y nang » ky nang, ly nang, v nang
nang o » nang co, nang ho, nang ro
dai su » dai sua, dai so, dan su
ve am » va am
o hoc » co hoc, mo hoc, so hoc

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 y nang o hoc. hieu ve am ((thuc va) or (((thuc day) OR (thuc dan)))) hanh dai su triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach y nang o hoc. hieu ve am ((thuc va) OR (((thuc day) OR (thuc dan)))) hanh dai su triet*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach y nang o hoc. hieu ve am ((thuc va) or (((thuc day) OR (thuc dan)))) hanh dai su triet*".