Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
hanh tai » thanh tai, hang tai, han tai
hieu van » hieu va, thien van, hieu ve
nang ma » tang ma, sang ma, nang cao
sach ky » sac ky, sach y, sach ty
xa hanh » xa thanh, xa khanh, va hanh
nang xa » nang x, lang xa, mang xa
tai cua » thai cua, tai cuc, tri cua
tu sach » thu sach, su sach, te sach
cau tu » dau tu, cau truc
tu xa » tu xay, tu va, te xa

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 ky ((nang xa) OR (nang ma)) hoi. ((hieu van) or (lieu va)) cau tu xa hanh tai cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky ((nang xa) OR (nang ma)) hoi. ((hieu van) OR (lieu va)) cau tu xa hanh tai cua triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ky ((nang xa) OR (nang ma)) hoi. ((hieu van) or (lieu va)) cau tu xa hanh tai cua triet".
• Adding a wildcard symbol may retrieve word variants: tu sach ky ((nang xa) OR (nang ma)) hoi. ((hieu van) or (lieu va)) cau tu xa hanh tai cua triet*.