Perhaps you should try some spelling variations:
luong van » luong va, duong van, luong vat
hanh dinh » thanh dinh, hinh dinh, hanh tinh
tay vung » tay nung, thai vung, tu vung
van hanh » van thanh, ban hanh, van anh
dinh cuu » dinh chi
sai tay » dai tay, san tay, thai tay
hieu ve » hieu va, hieu van
ve chat » va chat, van chat
cuu tre » cua tre, cau tren, cau treo
tu sai » tu bai, tu san, tu cai

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: tu sai tay vung ((xa hoi) OR (hoa hoc)). hieu ve chat luong van hanh dinh cuu tre~.
• Adding a wildcard symbol may retrieve word variants: tu sai tay vung ((xa hoi) or (hoa hoc)). hieu ve chat luong van hanh dinh cuu tre*.