Perhaps you should try some spelling variations:
thieu nang » thien nang, thieu khang, thieu quang
van thanh » ban thanh, van tuan
van hanh » ban hanh, van anh, van ban
vu sach » vu bach, su sach, vu khach
dau tuc » dau tu, dao tuc, cau truc
vai cua » dai cua, hai cua, lai cua
cua tre » cua te, cuu tre, cua triet
va dau » va dao
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: vu sach thieu nang x hoi. lieu va dau tuc ((van hanh) or (van thanh)) vai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu sach thieu nang x hoi. lieu va dau tuc ((van hanh) OR (van thanh)) vai cua tre.
• Adding a wildcard symbol may retrieve word variants: vu sach thieu nang x hoi. lieu va dau tuc ((van hanh) or (van thanh)) vai cua tre*.