Perhaps you should try some spelling variations:
va trien » va truyen, va thiet, va tuyen
su sach » so sach, vu sach
ty nang » ty xang, ty hang, ly nang
hieu ve » hieu va, hieu van
hanh ve » hanh vi, hanh va, hanh kem
ve cam » ve cham, ve cac, va cam
xuc va » tuc va, luc va, xac va
ve va » ve van, te va, ke va

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

• Performing a fuzzy search may retrieve terms with similar spellings: su sach ((ty nang) or (ky nang)) xa hoi. hieu ve cam ((xuc va) OR (duc va)) hanh ve va trien~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ((ty nang) OR (ky nang)) xa hoi. hieu ve cam ((xuc va) OR (duc va)) hanh ve va trien*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ((ty nang) or (ky nang)) xa hoi. hieu ve cam ((xuc va) OR (duc va)) hanh ve va trien*".