Perhaps you should try some spelling variations:
ban thanh » ban hanh, ban hang
thanh soc » thanh son, nhanh soc, thanh hoc
hieu ban » hieu van, dieu ban, lieu ban
van hanh » van thanh, ban hanh, van anh
soc van » hoc van, oc van, sac van
so sach » so sanh, bo sach, co sach
nang ma » tang ma, sang ma, nang cao
vu sach » vu bach, su sach, vu khach
ma hoi » mai hoi, xa hoi, ma hoa
di cua » doi cua, de cua, do cua

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 (vu sach)) ky nang ma hoi. hieu ban thanh soc van hanh ((di cua) OR (dai cua)) te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((so sach) OR (vu sach)) ky nang ma hoi. hieu ban thanh soc van hanh ((di cua) OR (dai cua)) te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((so sach) or (vu sach)) ky nang ma hoi. hieu ban thanh soc van hanh ((di cua) OR (dai cua)) te".
• Adding a wildcard symbol may retrieve word variants: ((so sach) or (vu sach)) ky nang ma hoi. hieu ban thanh soc van hanh ((di cua) OR (dai cua)) te*.