Perhaps you should try some spelling variations:
ban thanh » ban hanh, ban hang
hoa chat » hop chat, hoa phan
tu sach » thu sach, su sach, te sach
hoa cua » hoa xuat
luc ban » duc ban, cuc ban, luc bat
cam luc » cam xuc, cau luc
hieu va » lieu va, hieu qua
tang ma » mang may, tang van
ky tang » ky nang, ky dang, kho tang
vu sach » vu bach, su sach, vu khach
va cam » va cham, va cac, va cao
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) or (vu sach)) ky tang ma hoi. hieu va cam luc ban thanh ((hoa cua) OR (hoa chat)) tu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (vu sach)) ky tang ma hoi. hieu va cam luc ban thanh ((hoa cua) OR (hoa chat)) tu*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sach) or (vu sach)) ky tang ma hoi. hieu va cam luc ban thanh ((hoa cua) OR (hoa chat)) tu*".