Perhaps you should try some spelling variations:
nam thuc » nam thuoc, am thuc, nam thu
lang hoa » hang hoa, lang ha, nang hoa
su triet » su tien, ve triet
hanh vai » hanh vi, hanh va, hanh tai
thuc va » thuc vat, thuc dan, thuc day
va hanh » van hanh, va thanh, va danh
su sach » so sach, vu sach
sach ty » sach y, sach tu, sach thu
hieu ve » hieu va, hieu van
hoa hoi » khoa hoi, hoa hoc, hoa doi
ty lang » tay lang, ty xang, ty hang
su viet » so viet
ve nam » he nam, va nam, le nam

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 ty lang hoa hoi. hieu ve nam thuc va hanh vai ((su triet) or (su viet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ty lang hoa hoi. hieu ve nam thuc va hanh vai ((su triet) OR (su viet)).
• Adding a wildcard symbol may retrieve word variants: su sach ty lang hoa hoi. hieu ve nam thuc va hanh vai ((su triet) or (su viet))*.