Perhaps you should try some spelling variations:
tu sach » thu sach, su sach, te sach
sach ky » sac ky, sach y, sach ty
ky tang » ky nang, ky dang, kho tang
tang ma » mang may, tang van
qua cam » qua cham, qua cac, qua ca
xuc van » duc van, luc van, vuc van
duc ban » duc tan, duc van, dua ban
luu tre » luu tru, luy tre
cuu tre » cua tre, cau tren, cau treo
ma hoi » mai hoi, xa hoi, ma hoa

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 ky tang ma hoi. hieu qua cam ((xuc van) or (duc ban)) hanh vi ((luu tre) OR (cuu tre))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky tang ma hoi. hieu qua cam ((xuc van) OR (duc ban)) hanh vi ((luu tre) OR (cuu tre))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ky tang ma hoi. hieu qua cam ((xuc van) or (duc ban)) hanh vi ((luu tre) OR (cuu tre))*".