Perhaps you should try some spelling variations:
trinh vat » trinh van, trinh luat, sinh vat
toc sach » hoc sach, doc sach, thuoc sach
sach thu » sach thue, sach thieu, sach tham
thu dung » thuy dung, thuc dung, thu dang
dung tay » dung tai, dung may, vung tay
tay thai » lay thai, toc thai, y thai
hieu van » hieu va, thien van, lieu va
vat cuu » vat cua
cuu tre » cua tre, cau tren, cau treo
xuc va » duc va, luc va, xac va
tuc va » thuc va, truc va, tuc xa

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 thu dung tay thai. hieu van nam ((xuc va) or (tuc va)) trinh vat cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc sach thu dung tay thai. hieu van nam ((xuc va) OR (tuc va)) trinh vat cuu tre.
• Adding a wildcard symbol may retrieve word variants: toc sach thu dung tay thai. hieu van nam ((xuc va) or (tuc va)) trinh vat cuu tre*.