Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
thanh lap » thanh san, phan lap, thanh hai
hanh lai » hanh lam, hanh tai, thanh loi
luc van » luoc van, luu van, duc van
tu sach » thu sach, su sach, tu cach
hieu va » lieu va, hieu qua
nang ma » tang ma, sang ma, nang cao
te sach » toc sach
cac luc » cau luc, coc luc, cac nuoc
2 nang » v nang

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((tu sach) or (te sach)) 2 nang ma hoa. hieu va cac luc van ((hanh lai) OR (thanh lap)) cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (te sach)) 2 nang ma hoa. hieu va cac luc van ((hanh lai) OR (thanh lap)) cua triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sach) or (te sach)) 2 nang ma hoa. hieu va cac luc van ((hanh lai) OR (thanh lap)) cua triet".
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (te sach)) 2 nang ma hoa. hieu va cac luc van ((hanh lai) OR (thanh lap)) cua triet*.