Perhaps you should try some spelling variations:
sach thu » sach thue, sach thieu, sach tham
thu nang » thi nang, thu hang, thu bang
te sach » toc sach
thuc va » thuc vat, thuc dan, thuc day
va hanh » van hanh, va thanh, va danh
hanh di » hanh vi, hanh de, hang di
cua tre » cua te, cuu tre, cua triet
ve cam » ve cham, va cam, ve cai
ve cac » va cac, vien cac
di cua » dai cua, doi cua, de cua
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: te sach thu nang x hoi. hieu ((ve cam) or (ve cac)) thuc va hanh di cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach thu nang x hoi. hieu ((ve cam) OR (ve cac)) thuc va hanh di cua tre.
• Adding a wildcard symbol may retrieve word variants: te sach thu nang x hoi. hieu ((ve cam) or (ve cac)) thuc va hanh di cua tre*.