Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
thu sach » tu sach, thuat sach, thuoc sach
dang xay » dang van
hanh lai » hanh tai, thanh lap, thanh loi
hanh lam » thanh lap, hanh kem, hanh va
hieu va » lieu va, hieu qua
cac luc » cau luc, coc luc, cac nuoc
luc van » luoc van, luu van, duc van

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 y ((dang xay) or (van xay)) hoi. hieu va cac luc van ((hanh lai) OR (hanh lam)) cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach y ((dang xay) OR (van xay)) hoi. hieu va cac luc van ((hanh lai) OR (hanh lam)) cua triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu sach y ((dang xay) or (van xay)) hoi. hieu va cac luc van ((hanh lai) OR (hanh lam)) cua triet".
• Adding a wildcard symbol may retrieve word variants: thu sach y ((dang xay) or (van xay)) hoi. hieu va cac luc van ((hanh lai) OR (hanh lam)) cua triet*.