Perhaps you should try some spelling variations:
hieu phan » phieu phan, lieu phan, hieu pham
phan dau » phan tu, hang dau
dau truc » cau truc, dai truc, doan truc
truc va » thuc va, thuc vat, trung va
te sach » toc sach
ly hang » ly quang
cua tre » cua te, cuu tre, cua triet
dan te » van te, dan ve, dan de
dan tu » danh tu, dan su, ban tu
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 ((ky nang) or (ly hang)) x hoi. hieu phan dau truc va ((dan te) OR (dan tu)) cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ((ky nang) OR (ly hang)) x hoi. hieu phan dau truc va ((dan te) OR (dan tu)) cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ((ky nang) or (ly hang)) x hoi. hieu phan dau truc va ((dan te) OR (dan tu)) cua tre".
• Adding a wildcard symbol may retrieve word variants: te sach ((ky nang) or (ly hang)) x hoi. hieu phan dau truc va ((dan te) OR (dan tu)) cua tre*.