Perhaps you should try some spelling variations:
thanh phan » thanh pho, thanh san, thanh toan
pham duy » pham duc
hanh lam » thanh lap, hanh kem, hanh va
tang van » dang van, hoang van, trong van
vu pham » su pham, vi pham, vu kham
sach ty » sach y, sach thu, xach tay
hieu vu » hieu va, hieu ve, hieu su
van hoi » van hoa, van hoc, van hoe
sach tu » sach thu, cach tu, sach uu
cua tre » cua te, cuu tre, cua triet
duy va » duy vat, duy van, day va

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 ty) OR (sach tu)) tang van hoi. hieu vu pham duy va ((hanh lam) or (thanh phan)) cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su ((sach ty) OR (sach tu)) tang van hoi. hieu vu pham duy va ((hanh lam) OR (thanh phan)) cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su ((sach ty) OR (sach tu)) tang van hoi. hieu vu pham duy va ((hanh lam) or (thanh phan)) cua tre".
• Adding a wildcard symbol may retrieve word variants: su ((sach ty) OR (sach tu)) tang van hoi. hieu vu pham duy va ((hanh lam) or (thanh phan)) cua tre*.