Perhaps you should try some spelling variations:
thanh vien » nhan vien, thanh van
ban thanh » ban hanh, ban hang
thu sach » thuat sach, thuoc sach, thu hoach
hieu van » hieu va, thien van, lieu va
cam thuc » am thuc, nam thuc, cam thu
thuc ban » thuoc ban, thuc dan, thu ban
vien cua » viec cua, dien cua, tien cua
tu sach » su sach, te sach, tu cach
ty hang » ly hang, ty xang, thi hang
hang ma » hang va, hang ca, tang ma
van cam » van nam, van lam, van cau
cua tre » cua te, cuu tre, cua triet

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((thu sach) OR (tu sach)) ty hang ma hoa. hieu van cam thuc ban thanh vien cua tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((thu sach) OR (tu sach)) ty hang ma hoa. hieu van cam thuc ban thanh vien cua tre".
• Adding a wildcard symbol may retrieve word variants: ((thu sach) OR (tu sach)) ty hang ma hoa. hieu van cam thuc ban thanh vien cua tre*.