Perhaps you should try some spelling variations:
thanh pha » thanh phan, thanh pham, thanh pho
cau tren » cu tren, dau tren, ca tren
va thanh » gia thanh, ban thanh, va tinh
cau duc » cao duc, cau luc, cau truc
pha cau » phan cau, phap cau, pha cac
chu duc » thu duc, chua duoc, cuu duoc
tu sach » thu sach, su sach, tu cach
hieu va » lieu va, hieu qua
xang xa » lang xa, mang xa, ang xa
te sach » toc sach
y xang » ty xang

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) or (te sach)) y xang xa hoi. hieu va ((cau duc) OR (chu duc)) va thanh pha cau tren~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (te sach)) y xang xa hoi. hieu va ((cau duc) OR (chu duc)) va thanh pha cau tren.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sach) or (te sach)) y xang xa hoi. hieu va ((cau duc) OR (chu duc)) va thanh pha cau tren".
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (te sach)) y xang xa hoi. hieu va ((cau duc) OR (chu duc)) va thanh pha cau tren*.