Perhaps you should try some spelling variations:
thanh tai » thanh hai, thanh toan, doanh tai
va thanh » gia thanh, ban thanh, va tinh
su sach » so sach, vu sach
mai hoi » mai khoi, dai hoi, lai hoi
hieu va » lieu va, hieu qua
tai cua » thai cua, tai cuc, tri cua
cua tre » cua te, cuu tre, cua triet
y nang » ky nang, ly nang, v nang
ma hoi » xa hoi, ma hoa, me hoi
va cam » va cham, va cac, va cao
cam lo » nam lo, cam ly, cam o
lo va » lo van, lao va, ly va

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 y nang ((ma hoi) OR (mai hoi)). hieu va cam lo va thanh tai cua tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach y nang ((ma hoi) OR (mai hoi)). hieu va cam lo va thanh tai cua tre".
• Adding a wildcard symbol may retrieve word variants: su sach y nang ((ma hoi) OR (mai hoi)). hieu va cam lo va thanh tai cua tre*.