Perhaps you should try some spelling variations:
thanh lap » thanh san, phan lap, thanh hai
va triet » va thiet, va trien, ve triet
su triet » su viet, su tien, ve triet
sach ty » sach y, sach tu, sach thu
tu sach » thu sach, su sach, te sach
ty nang » ky nang, ty xang, ty hang
hac duc » hoc duc, thach duc, pham duc
ha duc » ho duc, ha dac, xa duc
x hoi » xa hoi, o hoi, x ho

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 ty nang x hoi. lieu va ((hac duc) OR (ha duc)) gia thanh lap ((su triet) or (va triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ty nang x hoi. lieu va ((hac duc) OR (ha duc)) gia thanh lap ((su triet) OR (va triet)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ty nang x hoi. lieu va ((hac duc) OR (ha duc)) gia thanh lap ((su triet) or (va triet))".
• Adding a wildcard symbol may retrieve word variants: tu sach ty nang x hoi. lieu va ((hac duc) OR (ha duc)) gia thanh lap ((su triet) or (va triet))*.