Perhaps you should try some spelling variations:
danh thai » dang thai, dinh thai, danh thanh
cua triet » cua viet, su triet, va triet
anh thai » anh thi, anh tai, nhanh thai
te sach » toc sach
sach ky » sac ky, sach y, sach ty
nang ma » tang ma, sang ma, nang cao
hieu va » hieu qua

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

• Performing a fuzzy search may retrieve terms with similar spellings: te sach ky nang ma hoa. ((hieu va) or (lieu va)) pham duc va ((danh thai) OR (anh thai)) cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ky nang ma hoa. ((hieu va) OR (lieu va)) pham duc va ((danh thai) OR (anh thai)) cua triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ky nang ma hoa. ((hieu va) or (lieu va)) pham duc va ((danh thai) OR (anh thai)) cua triet".
• Adding a wildcard symbol may retrieve word variants: te sach ky nang ma hoa. ((hieu va) or (lieu va)) pham duc va ((danh thai) OR (anh thai)) cua triet*.