Perhaps you should try some spelling variations:
va triet » va thiet, va trien, ve triet
dinh vu » dich vu, dinh ve, dinh cu
va dinh » van dinh, va kinh, va tinh
cau luc » cau truc, cau phuc
sach tu » sach thu, cach tu, sach ty
tu sach » thu sach, su sach, te sach
tu nang » tru nang, tu nong, tu nano
hieu ve » hieu va, hieu van
cam luc » cam xuc
x hoi » o hoi, x ho, 5 hoi
vu va » vu van, tu va, su va

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 tu nang ((x hoi) or (xa hoi)). hieu ve ((cam luc) OR (cau luc)) va dinh vu va triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach tu nang ((x hoi) OR (xa hoi)). hieu ve ((cam luc) OR (cau luc)) va dinh vu va triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach tu nang ((x hoi) or (xa hoi)). hieu ve ((cam luc) OR (cau luc)) va dinh vu va triet".
• Adding a wildcard symbol may retrieve word variants: tu sach tu nang ((x hoi) or (xa hoi)). hieu ve ((cam luc) OR (cau luc)) va dinh vu va triet*.