Perhaps you should try some spelling variations:
thuat sach » thuat lanh, thuat san
cua triet » cua viet, su triet, va triet
dang xay » van xay
dang van » hoang van, hang va
van hanh » van thanh, ban hanh, van anh
nam xuc » cam xuc, nam thuc, nam duoc
nam xua » nam cua, nam mua, nam qua
thi van » thi lan, thi hanh, thi nang
sach o » sach lo, sac o, sach y
vi cua » vai cua, di cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: thuat sach o ((dang xay) OR (dang van)) hoi. thi van ((nam xuc) or (nam xua)) van hanh vi cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thuat sach o ((dang xay) OR (dang van)) hoi. thi van ((nam xuc) OR (nam xua)) van hanh vi cua triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thuat sach o ((dang xay) OR (dang van)) hoi. thi van ((nam xuc) or (nam xua)) van hanh vi cua triet".
• Adding a wildcard symbol may retrieve word variants: thuat sach o ((dang xay) OR (dang van)) hoi. thi van ((nam xuc) or (nam xua)) van hanh vi cua triet*.