Perhaps you should try some spelling variations:
ban thanh » ban hanh, ban hang
thanh di » thanh doi, thanh de, thanh do
tu sach » thu sach, su sach, te sach
cao hoi » cau hoi, co hoi, cao hoc
cao suc » cao su, cao duc
suc ban » suc ben, duc ban, cuc ban
y nang » ky nang, ly nang, v nang
va cao » va cac, va co, va dao
di cua » dai cua, doi cua, de cua
cua su » qua su

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

• If you are trying to use Boolean operators, they must be ALL CAPS: ((thu hoach) OR (tu sach)) y nang cao hoi. lieu va cao suc ban thanh di cua su~.
• Adding a wildcard symbol may retrieve word variants: ((thu hoach) or (tu sach)) y nang cao hoi. lieu va cao suc ban thanh di cua su*.