Perhaps you should try some spelling variations:
khanh dai » thanh dat, khanh van, phan dai
xay khanh » xa khanh, van khanh, vay khach
cua triet » cua viet, su triet, va triet
thuc xay » thuc day, tuc xay, thuat xay
su sach » so sach
vu sach » vu bach, vu khach
nang ma » tang ma, sang ma, nang cao
v nang » va nang, vu nang, van nang
le nam » he nam, le na, te nam

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((su sach) or (vu sach)) v nang ma hoa. hieu ((le nam) OR (ly nam)) thuc xay khanh dai cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((su sach) OR (vu sach)) v nang ma hoa. hieu ((le nam) OR (ly nam)) thuc xay khanh dai cua triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((su sach) or (vu sach)) v nang ma hoa. hieu ((le nam) OR (ly nam)) thuc xay khanh dai cua triet".
• Adding a wildcard symbol may retrieve word variants: ((su sach) or (vu sach)) v nang ma hoa. hieu ((le nam) OR (ly nam)) thuc xay khanh dai cua triet*.