Perhaps you should try some spelling variations:
thien van » thi van
ban hanh » ban hang
cau tren » cu tren, dau tren, ca tren
tu sach » thu sach, su sach, te sach
sach ky » sac ky, sach y, sach ty
nam xuc » cam xuc, nam xua, nam thuc
xuc ban » duc ban, cuc ban, quoc ban
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) or (nang cao)) hoi. thien van nam xuc ban hanh vi cau tren~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky ((mang may) OR (nang cao)) hoi. thien van nam xuc ban hanh vi cau tren.
• Adding a wildcard symbol may retrieve word variants: tu sach ky ((mang may) or (nang cao)) hoi. thien van nam xuc ban hanh vi cau tren*.