Perhaps you should try some spelling variations:
thuat sach » thuat lanh, thuat san
cua triet » cua viet, su triet, va triet
minh tri » dinh tri, chinh tri, minh thu
nang xa » nang x, nang ma, mang xa
lang xa » lang ha, dang xay, lang van
hieu ha » hieu hoa, hieu va, hieu ca
va minh » van minh, vua minh, va kinh
cua tre » cua te, cuu tre, dua tren
nam tu » nam thu, nam thuc

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

• Performing a fuzzy search may retrieve terms with similar spellings: thuat sach y ((nang xa) or (lang xa)) hoi. hieu ha nam tu va minh tri ((cua tre) OR (cua triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thuat sach y ((nang xa) OR (lang xa)) hoi. hieu ha nam tu va minh tri ((cua tre) OR (cua triet)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "thuat sach y ((nang xa) or (lang xa)) hoi. hieu ha nam tu va minh tri ((cua tre) OR (cua triet))".
• Adding a wildcard symbol may retrieve word variants: thuat sach y ((nang xa) or (lang xa)) hoi. hieu ha nam tu va minh tri ((cua tre) OR (cua triet))*.