Perhaps you should try some spelling variations:
day thanh » dao thanh, dat thanh, da thanh
dac nhan » cac nhan, danh nhan, ca nhan
vu sach » vu bach, vu khach
doi cua » dai cua, hoi cua
cac thu » cach thuc, cac thoi
hieu va » lieu va, hieu qua
su sach » so sach
cua te » cua tu
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) or (su sach)) ky nang x hoi. hieu va cac thu ((day thanh) or (dac nhan)) doi cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((vu sach) OR (su sach)) ky nang x hoi. hieu va cac thu ((day thanh) OR (dac nhan)) doi cua te.
• Adding a wildcard symbol may retrieve word variants: ((vu sach) or (su sach)) ky nang x hoi. hieu va cac thu ((day thanh) or (dac nhan)) doi cua te*.