Perhaps you should try some spelling variations:
tu sach » thu sach, su sach, te sach
sach ky » sac ky, sach y, sach ty
ky mang » ky nang, ke mang, ky dang
may hoa » may khoa, ma hoa, day hoa
qua cai » qua hai, qua cac, quan cau
luc van » luoc van, luu van, duc van
cuc ban » cua ban, cac ban, cuu ban
qua ca » qua cac, qua cua, quan cau
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: tu sach ky mang may hoa. hieu ((qua ca) OR (qua cai)) ((luc van) or (cuc ban)) hanh vi cau tao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky mang may hoa. hieu ((qua ca) OR (qua cai)) ((luc van) OR (cuc ban)) hanh vi cau tao*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ky mang may hoa. hieu ((qua ca) OR (qua cai)) ((luc van) or (cuc ban)) hanh vi cau tao*".