Perhaps you should try some spelling variations:
thanh lay » thanh lap, thanh tay, thanh lam
vat thanh » dat thanh, gat thanh, tat thanh
cua triet » cua viet, su triet, va triet
nam thuc » nam thuoc, am thuc, nam thu
dua tren » dung tren
vu sach » vu bach, su sach, vu khach
sach ky » sac ky, sach y, sach ty
hieu ve » hieu va, hieu van
cua tre » cua te, cuu tre, cua thep
ve nam » he nam, va nam, le nam
x hoi » xa hoi, o hoi, x ho

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 ky nang x hoi. hieu ve nam thuc vat thanh lay ((((cua tre) or (dua tren))) or (cua triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu sach ky nang x hoi. hieu ve nam thuc vat thanh lay ((((cua tre) OR (dua tren))) OR (cua triet)).
• Adding a wildcard symbol may retrieve word variants: vu sach ky nang x hoi. hieu ve nam thuc vat thanh lay ((((cua tre) or (dua tren))) or (cua triet))*.