Perhaps you should try some spelling variations:
trinh vai » trinh van, trinh tai, trinh vat
di truyen » co truyen
so sanh » do sanh
ty nang » ty xang, ty hang, ly nang
hieu ve » hieu va, hieu van
ve cam » ve cham, ve cac, va cam
xuc va » tuc va, luc va, xac va
vai di » hai di, va di, vai diem

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

• If you are trying to use Boolean operators, they must be ALL CAPS: so sanh ((ty nang) OR (ky nang)) xa hoi. hieu ve cam ((xuc va) OR (duc va)) trinh vai di truyen~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "so sanh ((ty nang) or (ky nang)) xa hoi. hieu ve cam ((xuc va) OR (duc va)) trinh vai di truyen~".
• Adding a wildcard symbol may retrieve word variants: so sanh ((ty nang) or (ky nang)) xa hoi. hieu ve cam ((xuc va) OR (duc va)) trinh vai di truyen*.