Perhaps you should try some spelling variations:
thuat sach » thuat lanh, thuat san
thanh hai » thanh phan, thanh hoa, thanh san
cau tren » cu tren, dau tren, ca tren
xa thanh » va thanh, ha thanh, ta thanh
cam tuc » cam xuc, cam tu, nam thuc
hieu va » lieu va, hieu qua
sach ty » sach y, sach tu, sach thu
hieu ve » hieu van
lang xa » lang ha, dang xay, lang van
ty lang » tay lang, ty xang, ty hang
cua tre » cua te, cuu tre, cua triet

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

• Performing a fuzzy search may retrieve terms with similar spellings: thuat sach ty lang xa hoi. ((hieu ve) OR (hieu va)) cam tuc xa thanh hai ((cau tren) or (cua tre))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thuat sach ty lang xa hoi. ((hieu ve) OR (hieu va)) cam tuc xa thanh hai ((cau tren) OR (cua tre))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thuat sach ty lang xa hoi. ((hieu ve) OR (hieu va)) cam tuc xa thanh hai ((cau tren) or (cua tre))*".