Perhaps you should try some spelling variations:
tao nganh » tao nhan, cac nganh, da nganh
chua tre » chua tri, cua tre, chua trieu
ban hanh » ban hang
bac hoi » bac ho, bac hoc, sach hoi
hieu va » lieu va, hieu qua
cam duc » cam xuc, cao duc, pham duc
duc ban » duc tan, duc van, dua ban
co sach » bo sach, cuon sach, hoc sach
hanh va » hang va, hanh vi
va chua » vua chua, ca chua, va chu
so sach » so sanh, bo sach, hoc sach
va cam » va cham, va cac, va cao

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((so sach) OR (co sach)) ((tao nganh) or (bao cao)) bac hoi. hieu va cam duc ban hanh va chua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((so sach) OR (co sach)) ((tao nganh) OR (bao cao)) bac hoi. hieu va cam duc ban hanh va chua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((so sach) OR (co sach)) ((tao nganh) or (bao cao)) bac hoi. hieu va cam duc ban hanh va chua tre".
• Adding a wildcard symbol may retrieve word variants: ((so sach) OR (co sach)) ((tao nganh) or (bao cao)) bac hoi. hieu va cam duc ban hanh va chua tre*.