Perhaps you should try some spelling variations:
thu nang » thi nang, thu bang, tho nang
thu hang » thi hang, thuc hanh, thu huong
thuc van » thuc vat, thuc dan, thuc hanh
te sach » toc sach
hanh di » hanh vi, hanh de, hang di
thuc va » thuc vat, thuc dan, thuc day
qua cam » qua cham, qua cac, qua ca
cua tre » cua te, cuu tre, cua triet
di cua » dai cua, doi cua, de cua
o hoi » co hoi, o hoc, o hai

You may be able to get more results by adjusting your search query.

• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ((thu nang) OR (thu hang)) o hoi. hieu qua cam ((thuc van) OR (thuc va)) hanh di cua tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ((thu nang) OR (thu hang)) o hoi. hieu qua cam ((thuc van) or (thuc va)) hanh di cua tre~".
• Adding a wildcard symbol may retrieve word variants: te sach ((thu nang) OR (thu hang)) o hoi. hieu qua cam ((thuc van) or (thuc va)) hanh di cua tre*.