Perhaps you should try some spelling variations:
phan luoc » phan quoc, phan duoc, phan nuoc
va triet » va thiet, va trien, ve triet
van hanh » van thanh, ban hanh, van anh
luoc van » luoc can, luoc va, luc van
sach ky » sac ky, sach y, sach kem
va phan » van phan, va phat, va phap
hieu va » lieu va, hieu qua
sach ty » sach y, sach tu, sach thu
su tien » su kien, su hien, tu tieng
x hoi » xa hoi, o hoi, x ho

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

• Performing a fuzzy search may retrieve terms with similar spellings: thu ((sach ky) or (sach ty)) nang x hoi. hieu va phan luoc van hanh vi ((va triet) or (su tien))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu ((sach ky) OR (sach ty)) nang x hoi. hieu va phan luoc van hanh vi ((va triet) OR (su tien)).
• Adding a wildcard symbol may retrieve word variants: thu ((sach ky) or (sach ty)) nang x hoi. hieu va phan luoc van hanh vi ((va triet) or (su tien))*.