Perhaps you should try some spelling variations:
ban thanh » ban hanh, ban hang
thanh lap » thanh san, phan lap, thanh hai
chat luc » chat xuc, chat lua, chat huu
nhan luc » nang luc
tu sach » thu sach, su sach, te sach
ty dung » tay dung, ly dung, te dung
tai hoi » tai khoi, dai hoi, tai hai
hieu ve » hieu va, hieu van
cua tre » cuu tre, cua triet, dua tren
sach ty » sach y, sach tu, sach thu
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 ty dung tai hoi. hieu ve ((chat luc) OR (nhan luc)) ban thanh lap ((cua tre) or (cua te))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ty dung tai hoi. hieu ve ((chat luc) OR (nhan luc)) ban thanh lap ((cua tre) OR (cua te)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ty dung tai hoi. hieu ve ((chat luc) OR (nhan luc)) ban thanh lap ((cua tre) or (cua te))".
• Adding a wildcard symbol may retrieve word variants: tu sach ty dung tai hoi. hieu ve ((chat luc) OR (nhan luc)) ban thanh lap ((cua tre) or (cua te))*.