Perhaps you should try some spelling variations:
dang xay » dang van, van xay
cau tren » cu tren, dau tren, ca tren
sach ky » sac ky, sach y, sach kem
sach ty » sach y, sach tu, sach thu
xay hoi » xa hoi, tay hoi, cay phoi
hieu va » lieu va, hieu qua
nam xuc » cam xuc, nam xua, nam thuc
va hanh » van hanh, va thanh, va danh
va nam » van nam, ha nam, va nay
xuc va » duc va, tuc va, luc va
vi cau » va cau, ve cau, di cau

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

• Performing a fuzzy search may retrieve terms with similar spellings: thuoc ((sach ky) OR (sach ty)) dang xay hoi. hieu va nam xuc va hanh vi cau tren~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thuoc ((sach ky) OR (sach ty)) dang xay hoi. hieu va nam xuc va hanh vi cau tren".
• Adding a wildcard symbol may retrieve word variants: thuoc ((sach ky) OR (sach ty)) dang xay hoi. hieu va nam xuc va hanh vi cau tren*.