Perhaps you should try some spelling variations:
su triet » su viet, su tien, ve triet
ve cham » va cham, ve chat, vu cham
nang va » nang van, hang va, nang ma
va nang » van nang, da nang, cam nang
truc va » thuc va, thuc vat, trung va
so sach » so sanh, bo sach, co sach
y nang » ky nang, ly nang, may nang
v nang » vu nang, van nang, voi nang
va cam » va cham, va cac, va cao

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

• Performing a fuzzy search may retrieve terms with similar spellings: so sach ((y nang) OR (v nang)) xa hoi. hieu ((va cam) or (ve cham)) truc va nang va su triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sach ((y nang) OR (v nang)) xa hoi. hieu ((va cam) OR (ve cham)) truc va nang va su triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "so sach ((y nang) OR (v nang)) xa hoi. hieu ((va cam) or (ve cham)) truc va nang va su triet".
• Adding a wildcard symbol may retrieve word variants: so sach ((y nang) OR (v nang)) xa hoi. hieu ((va cam) or (ve cham)) truc va nang va su triet*.