Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
hieu van » hieu va, thien van, lieu va
van nhan » van phan, van thanh, danh nhan
duc manh » suc manh, duc anh, duc minh
te sach » toc sach
ky dang » ky danh
duc van » duc va, duc tan, duc phan
anh ve » hanh ve, anh va, anh viet
ve cua » le cua, de cua, te cua

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

• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ((ky dang) OR (ky nang)) xa hoi. hieu van nhan ((duc van) OR (duc manh)) anh ve cua triet~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ((ky dang) or (ky nang)) xa hoi. hieu van nhan ((duc van) OR (duc manh)) anh ve cua triet~".
• Adding a wildcard symbol may retrieve word variants: te sach ((ky dang) or (ky nang)) xa hoi. hieu van nhan ((duc van) OR (duc manh)) anh ve cua triet*.