Perhaps you should try some spelling variations:
va triet » va thiet, va trien, ve triet
tinh lap » trinh lap, tinh lao, dinh lap
va tinh » may tinh
cau luc » cau truc, cau phuc
hieu ve » hieu va, hieu van
tu sach » thu sach, te sach, tu cach
su sach » so sach, vu sach
luc va » duc va, tuc va, loc va
lap va » tap va
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) or (su sach)) ky nang x hoi. ((hieu ve) or (lieu va)) cau luc va tinh lap va triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (su sach)) ky nang x hoi. ((hieu ve) OR (lieu va)) cau luc va tinh lap va triet.
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (su sach)) ky nang x hoi. ((hieu ve) or (lieu va)) cau luc va tinh lap va triet*.