Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
van hanh » van thanh, ban hanh, van anh
phan luc » nhan luc, phan duc, phan suc
su sach » so sach, vu sach
luc van » luoc van, luu van, duc van
va phan » van phan, va phat, va phap
hieu va » lieu va, hieu qua
lang ha » long ha
ky lang » ky nang, ky dang, ky tang
te sach » toc sach
ha hoi » hoa hoi, ha noi, xa hoi

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) or (te sach)) ky lang ha hoi. hieu va phan luc van hanh vi ((cua triet) or (hoa viet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((su sach) OR (te sach)) ky lang ha hoi. hieu va phan luc van hanh vi ((cua triet) OR (hoa viet)).
• Adding a wildcard symbol may retrieve word variants: ((su sach) or (te sach)) ky lang ha hoi. hieu va phan luc van hanh vi ((cua triet) or (hoa viet))*.