Perhaps you should try some spelling variations:
hieu phan » phieu phan, lieu phan, hieu pham
phan dau » phan tu, hang dau
hanh vai » hanh vi, hanh va, hanh tai
sach thu » sach thue, sach thieu, sach tham
trung va » truong va, trang va, trung ha
vai cuu » vai cua
truc va » thuc va, thuc vat
sach ky » sac ky, sach y, sach ty
lang xa » lang ha, dang xay, lang van
cuu tre » cua tre, cau tren, cau treo

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu ((sach ky) or (sach thu)) lang xa hoi. hieu phan dau ((truc va) OR (trung va)) hanh vai cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((sach ky) OR (sach thu)) lang xa hoi. hieu phan dau ((truc va) OR (trung va)) hanh vai cuu tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu ((sach ky) or (sach thu)) lang xa hoi. hieu phan dau ((truc va) OR (trung va)) hanh vai cuu tre".
• Adding a wildcard symbol may retrieve word variants: tu ((sach ky) or (sach thu)) lang xa hoi. hieu phan dau ((truc va) OR (trung va)) hanh vai cuu tre*.