Perhaps you should try some spelling variations:
sach tay » xach tay, sach hay, sach nay
tay song » tay son, hay song, ta song
chau tre » chay tren, chau tho, cau tra
hieu van » hieu va, thien van, lieu va
dinh lai » dinh lam, dinh lap, dinh tai
te sach » toc sach
va dinh » van dinh, va kinh, va tinh
hau loc » huu loc, phau hoc
cho tre » cho thue, khoe tre
cau loc » cau hoc, cau luc, cau long
song xa » song cua

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 tay song xa hoi. hieu van ((cau loc) or (hau loc)) va dinh lai ((chau tre) OR (cho tre))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach tay song xa hoi. hieu van ((cau loc) OR (hau loc)) va dinh lai ((chau tre) OR (cho tre))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach tay song xa hoi. hieu van ((cau loc) or (hau loc)) va dinh lai ((chau tre) OR (cho tre))*".