Perhaps you should try some spelling variations:
thanh vai » thanh hai, thanh van, thanh tai
vat thanh » dat thanh, gat thanh, tat thanh
cau tren » cu tren, dau tren, ca tren
va chat » van chat, va phat, cao chat
vai cau » va cau, van cau, vai cac
su sach » so sach, vu sach
sach ty » sach y, sach tu, sach thu
va cam » va cham, va cac, va cao

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 ((xang x) or (nang x)) hoi. hieu ((va cam) or (va chat)) thuc vat thanh vai cau tren~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ty ((xang x) OR (nang x)) hoi. hieu ((va cam) OR (va chat)) thuc vat thanh vai cau tren.
• Adding a wildcard symbol may retrieve word variants: su sach ty ((xang x) or (nang x)) hoi. hieu ((va cam) or (va chat)) thuc vat thanh vai cau tren*.