Perhaps you should try some spelling variations:
thanh dat » thanh san, thanh hai, thanh van
vat thanh » dat thanh, gat thanh, tat thanh
toc sach » hoc sach, doc sach, thuoc sach
qua cham » qua hai, qua cac, va cham
dat cua » dai cua, day cua, mat cua
qua cam » qua cac, qua ca, qua cai
mai hoi » mai khoi, dai hoi, lai hoi
cua tre » cua te, cuu tre, cua triet
sach v » sach va, sach y, sach 2
ma hoi » xa hoi, ma hoa, me hoi
v nang » va nang, vu nang, van nang

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 v nang ((ma hoi) or (mai hoi)). hieu ((qua cam) or (qua cham)) thuc vat thanh dat cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc sach v nang ((ma hoi) OR (mai hoi)). hieu ((qua cam) OR (qua cham)) thuc vat thanh dat cua tre.
• Adding a wildcard symbol may retrieve word variants: toc sach v nang ((ma hoi) or (mai hoi)). hieu ((qua cam) or (qua cham)) thuc vat thanh dat cua tre*.