Perhaps you should try some spelling variations:
thanh hai » thanh phan, thanh hoa, thanh san
thanh tai » thanh toan, doanh tai, thanh san
cao viet » dao viet, co viet, ca viet
hieu cua » hieu qua, dieu cua, bieu cua
ty nang » ky nang, ty xang, ly nang
ty hang » ly hang, ty xang, thi hang
cac lo » cac lop, cac co, cac bo
lo va » lo van, lao va, ly va
cuoc » quoc, duoc

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

• Performing a fuzzy search may retrieve terms with similar spellings: cuoc cach ((ty nang) or (ty hang)) xa hoi. hieu cua cac lo va ((thanh tai) OR (thanh hai)) cao viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: cuoc cach ((ty nang) OR (ty hang)) xa hoi. hieu cua cac lo va ((thanh tai) OR (thanh hai)) cao viet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "cuoc cach ((ty nang) or (ty hang)) xa hoi. hieu cua cac lo va ((thanh tai) OR (thanh hai)) cao viet".
• Adding a wildcard symbol may retrieve word variants: cuoc cach ((ty nang) or (ty hang)) xa hoi. hieu cua cac lo va ((thanh tai) OR (thanh hai)) cao viet*.