Perhaps you should try some spelling variations:
thien van » thi van
tinh vien » sinh vien, tinh dien, tinh viet
thuc day » thuc dan, thuc vat
vien cuu » vien huu, vien buu, viec cua
su sach » so sach, vu sach
sach ky » sac ky, sach y, sach ty
thuc va » thuc vat, thuc dan
cuu tre » cua tre, cau tren, cau treo
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: su sach ky nang x hoi. thien van nam ((thuc va) OR (thuc day)) tinh vien cuu tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ky nang x hoi. thien van nam ((thuc va) OR (thuc day)) tinh vien cuu tre".
• Adding a wildcard symbol may retrieve word variants: su sach ky nang x hoi. thien van nam ((thuc va) OR (thuc day)) tinh vien cuu tre*.