Perhaps you should try some spelling variations:
tham thuc » nham thuc, pham thuc, tam thuc
doanh va » doan va, doanh tai, doanh cua
hanh vai » hanh vi, hanh tai, hanh van
vu sach » vu bach, su sach, vu khach
sach ta » sach tai, sach xa, sach ha
hanh va » hanh vi
thuc va » thuc vat, thuc dan, thuc day
ve tham » va tham, ve cham, vi tham
hieu ve » hieu va, hieu van
ta hang » va hang, ty hang, te hang
cuu tre » cua tre, cau tren, cau treo
va noi » van noi, va ngoi, va nuoi

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

• Performing a fuzzy search may retrieve terms with similar spellings: vu sach ta hang va noi. hieu ve tham thuc va ((((hanh vai) or (hanh va))) or (doanh va)) cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu sach ta hang va noi. hieu ve tham thuc va ((((hanh vai) OR (hanh va))) OR (doanh va)) cuu tre.
• Adding a wildcard symbol may retrieve word variants: vu sach ta hang va noi. hieu ve tham thuc va ((((hanh vai) or (hanh va))) or (doanh va)) cuu tre*.