Perhaps you should try some spelling variations:
su triet » su viet, su tien, ve triet
sach ly » sach y, sach ty, sach hay
sach lo » sach dao, sach doi, sach hoi
nang ma » tang ma, sang ma, nang cao
thuc va » thuc vat, thuc dan, thuc day
hanh va » hang va, hanh vi
ma hoi » mai hoi, xa hoi, ma hoa

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: su ((sach ly) OR (sach lo)) nang ma hoi. lieu va cac ((duc va) or (thuc va)) hanh va su triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su ((sach ly) OR (sach lo)) nang ma hoi. lieu va cac ((duc va) OR (thuc va)) hanh va su triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su ((sach ly) OR (sach lo)) nang ma hoi. lieu va cac ((duc va) or (thuc va)) hanh va su triet".
• Adding a wildcard symbol may retrieve word variants: su ((sach ly) OR (sach lo)) nang ma hoi. lieu va cac ((duc va) or (thuc va)) hanh va su triet*.