Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
dang xay » dang van, van xay
hanh dai » hanh tai, hanh dao, vanh dai
van hanh » van thanh, ban hanh, van anh
than luc » nhan luc, than duc, thanh luu
thu sach » tu sach, thuat sach, thuoc sach
ky dang » ky nang, ky danh
xay hoi » xa hoi, tay hoi, cay phoi
te sach » toc sach
thi van » thi lan, thi hanh, thi nang
ha luc » ha duc, nhan luc

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) or (te sach)) ky dang xay hoi. thi van ((ha luc) OR (than luc)) van hanh dai cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((thu sach) OR (te sach)) ky dang xay hoi. thi van ((ha luc) OR (than luc)) van hanh dai cua triet*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((thu sach) or (te sach)) ky dang xay hoi. thi van ((ha luc) OR (than luc)) van hanh dai cua triet*".