Perhaps you should try some spelling variations:
gia hanh » gia thanh, giao hanh, gia anh
te sach » toc sach
sach ty » sach y, sach tu, sach thu
luu tre » luu tru, luy tre
cao duc » dao duc, cao suc, giao duc
cuu tre » cua tre, cau tren, cau treo
cam duc » cam xuc, pham duc, nam duoc
hieu ve » hieu va, hieu van
lang xa » lang ha, dang xay, lang van
ty lang » tay lang, ty xang, ty hang

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 ty lang xa hoi. hieu ve ((cam duc) or (cao duc)) gia hanh vi ((luu tre) OR (cuu tre))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ty lang xa hoi. hieu ve ((cam duc) OR (cao duc)) gia hanh vi ((luu tre) OR (cuu tre)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ty lang xa hoi. hieu ve ((cam duc) or (cao duc)) gia hanh vi ((luu tre) OR (cuu tre))".
• Adding a wildcard symbol may retrieve word variants: te sach ty lang xa hoi. hieu ve ((cam duc) or (cao duc)) gia hanh vi ((luu tre) OR (cuu tre))*.