Perhaps you should try some spelling variations:
thuat sach » thuat lanh, thuat san
van thanh » ban thanh, van tuan
cua triet » cua viet, va triet
thanh va » thanh van, hanh va, thanh ha
su triet » su viet, su tien, ve triet
hieu ve » hieu va, hieu van
y nang » ly nang, v nang, may nang
ve cac » va cac, vien cac
cac lo » cac lop, cac co, cac bo
lo van » le van, vo van, so van

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) or (ky nang)) x ho. hieu ve cac lo van thanh va ((cua triet) OR (su triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thuat sach ((y nang) OR (ky nang)) x ho. hieu ve cac lo van thanh va ((cua triet) OR (su triet)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "thuat sach ((y nang) or (ky nang)) x ho. hieu ve cac lo van thanh va ((cua triet) OR (su triet))".
• Adding a wildcard symbol may retrieve word variants: thuat sach ((y nang) or (ky nang)) x ho. hieu ve cac lo van thanh va ((cua triet) OR (su triet))*.