Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
thi hanh » thi thanh
hanh dai » hanh tai, hanh dao, vanh dai
van hanh » van thanh, ban hanh, van anh
thu sach » tu sach, thuat sach, thuoc sach
dang xay » dang van, van xay
xay hoi » xa hoi, tay hoi, cay phoi
sach so » mach so, sach lo, sach song
nam duc » nam duoc, pham duc, nam thuc
duc van » duc va, duc tan, duc manh
so dang » su dang, so dan, so dung
cua tre » cua te, cuu tre, dua tren
thi lan » thi nang, thi lien

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 so dang xay hoi. ((thi hanh) or (thi lan)) nam duc van hanh dai ((cua tre) OR (cua triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach so dang xay hoi. ((thi hanh) OR (thi lan)) nam duc van hanh dai ((cua tre) OR (cua triet)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu sach so dang xay hoi. ((thi hanh) or (thi lan)) nam duc van hanh dai ((cua tre) OR (cua triet))".
• Adding a wildcard symbol may retrieve word variants: thu sach so dang xay hoi. ((thi hanh) or (thi lan)) nam duc van hanh dai ((cua tre) OR (cua triet))*.