Perhaps you should try some spelling variations:
thuoc sach » hoc sach, nuoc sach, thuat sach
doanh van » doan van, doanh va, doanh ban
thu sach » tu sach, thuat sach, thu hoach
va doanh » van doanh, vay doanh, va danh
thu ban » thu hang
hieu va » lieu va, hieu qua
cao lao » cao lan, cao dao, co lao
van chi » van chien, luan chi, van chat
chi tre » choi tre, cho tre, chi tro
va cao » va cac, va co, va dao
lao va » tao va, cao va, bao va
x hoi » xa hoi, o hoi, x ho

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((((thu sach) or (thuoc sach))) or (thu ban)) ky nang x hoi. hieu va cao lao va doanh van chi tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((((thu sach) OR (thuoc sach))) OR (thu ban)) ky nang x hoi. hieu va cao lao va doanh van chi tre.
• Adding a wildcard symbol may retrieve word variants: ((((thu sach) or (thuoc sach))) or (thu ban)) ky nang x hoi. hieu va cao lao va doanh van chi tre*.