Perhaps you should try some spelling variations:
tinh dai » trinh dai, tinh da, tinh hai
nang xa » nang x, lang xa, nang ma
qua hai » qua hoat
cua tre » cua te, cua triet, dua tren
cuu tre » cau tren, cau treo
su van » tu van, vu van
xuc va » duc va, luc va, xac va
tuc va » thuc va, truc va, tuc xa

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: su van ky nang xa hoi. hieu qua hai ((xuc va) OR (tuc va)) tinh dai ((cua tre) OR (cuu tre))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su van ky nang xa hoi. hieu qua hai ((xuc va) OR (tuc va)) tinh dai ((cua tre) or (cuu tre))~".
• Adding a wildcard symbol may retrieve word variants: su van ky nang xa hoi. hieu qua hai ((xuc va) OR (tuc va)) tinh dai ((cua tre) or (cuu tre))*.