Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
cau tren » cu tren, dau tren, ca tren
sach dao » lanh dao
dang xay » dang van, van xay
va hanh » van hanh, va thanh, va danh
dau luc » cau luc, dau luan, dau nuoc
van dau » van dao, phan dau
su sach » so sach, vu sach
nang xa » nang x, lang xa, nang ma
thi van » thi lan, thi hanh, thi nang
luc va » duc va, tuc va, loc va

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

• Performing a fuzzy search may retrieve terms with similar spellings: su sach dao ((nang xa) or (dang xay)) hoi. thi van dau luc va hanh vi ((cua triet) or (cau tren))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach dao ((nang xa) OR (dang xay)) hoi. thi van dau luc va hanh vi ((cua triet) OR (cau tren)).
• Adding a wildcard symbol may retrieve word variants: su sach dao ((nang xa) or (dang xay)) hoi. thi van dau luc va hanh vi ((cua triet) or (cau tren))*.