Perhaps you should try some spelling variations:
thanh dai » thanh hai, thanh tai, thanh dat
toc sach » hoc sach, doc sach, thuoc sach
cac truc » cau truc, cac tru, cac trung
va thanh » gia thanh, ban thanh, va tinh
sach ly » sach y, sach lo, sach ty
ly nang » ky nang, ly hang, ly vang
mai hoi » mai khoi, dai hoi, lai hoi
hieu va » lieu va, hieu qua
truc va » thuc va, thuc vat, trung va
cua tre » cua te, cuu tre, cua triet
ma hoi » xa hoi, ma hoa, me hoi

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

• Performing a fuzzy search may retrieve terms with similar spellings: toc sach ly nang ((ma hoi) or (mai hoi)). hieu va cac truc va thanh dai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc sach ly nang ((ma hoi) OR (mai hoi)). hieu va cac truc va thanh dai cua tre.
• Adding a wildcard symbol may retrieve word variants: toc sach ly nang ((ma hoi) or (mai hoi)). hieu va cac truc va thanh dai cua tre*.