Perhaps you should try some spelling variations:
thanh lai » thanh hai, thanh lap, thanh loi
va thanh » gia thanh, ban thanh, va tinh
hang tai » hang va, dung tai
nhan luc » nang luc
tu sach » thu sach, su sach, tu cach
vu nhan » cu nhan, vu ngan, tu nhan
cuu tre » cua tre, cau tren, cau treo
hieu vu » hieu va, hieu ve, hieu su
tai hoi » tai khoi, dai hoi, tai hai
ky hang » ky nang, ly hang, ky dang
te sach » toc sach
luc va » duc va, tuc va, loc va
cua te » cua tu

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((tu sach) or (te sach)) ky hang tai hoi. hieu vu nhan luc va thanh lai ((cuu tre) or (cua te))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (te sach)) ky hang tai hoi. hieu vu nhan luc va thanh lai ((cuu tre) OR (cua te)).
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (te sach)) ky hang tai hoi. hieu vu nhan luc va thanh lai ((cuu tre) or (cua te))*.