Perhaps you should try some spelling variations:
cau treo » cau theo, cau triet, cau trieu
hieu van » hieu va, thien van, lieu va
cau tren » cu tren, dau tren, ca tren
thanh vi » hanh vi, thanh va, thanh ve
va thanh » gia thanh, ban thanh, va tinh
pham duy » pham duc
van pham » san pham, van phan, van phat
toc sach » hoc sach, doc sach, thuoc sach
lang xa » lang ha, dang xay, lang van
ky lang » ky nang, ky dang, ky tang
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: ((te sach) OR (toc sach)) ky lang xa hoi. hieu van pham duy va thanh vi ((cau tren) or (cau treo))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((te sach) OR (toc sach)) ky lang xa hoi. hieu van pham duy va thanh vi ((cau tren) OR (cau treo))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((te sach) OR (toc sach)) ky lang xa hoi. hieu van pham duy va thanh vi ((cau tren) or (cau treo))*".