Perhaps you should try some spelling variations:
hieu viec » nhieu viec, hieu ve, sieu viet
cua triet » cua viet, su triet, va triet
viec cac » vien cac, viec cua, viec lam
tan hanh » tan thanh, tang hanh, toan hanh
hanh dan » thanh dan, hanh san, canh dan
su sach » so sach, vu sach
sach ky » sac ky, sach y, sach ty
ky danh » ky anh, ky dang
tay hoi » tay ho, tay thai
tao hoi » tao khoi, tao boi, thao hoc
cac duc » cac du, cao duc, cac dac
dan cua » dan ca, ban cua, dai cua

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 ky danh ((tay hoi) OR (tao hoi)). hieu viec cac duc tan hanh dan cua triet~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ky danh ((tay hoi) OR (tao hoi)). hieu viec cac duc tan hanh dan cua triet*".