Perhaps you should try some spelling variations:
thien van » thi van
cam thuc » am thuc, nam thuc, cam thu
tinh nha » trinh nha, tinh ha, hinh nha
nang xa » nang x, lang xa, nang ma
van cam » van nam, van lam, van cau
thuc va » thuc vat, thuc dan, thuc day
va tinh » may tinh
nha cua » nhat cua, nhan cua, nghia cua
cua tre » cua te, cuu tre, cua triet
sach v » sach va, sach 2, sach vay

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 v) or (sach y)) nang xa hoi. thien van cam thuc va tinh nha cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su ((sach v) OR (sach y)) nang xa hoi. thien van cam thuc va tinh nha cua tre.
• Adding a wildcard symbol may retrieve word variants: su ((sach v) or (sach y)) nang xa hoi. thien van cam thuc va tinh nha cua tre*.