Perhaps you should try some spelling variations:
qua than » qua thanh, qua phan, qua tan
thuc dan » thuc hanh, hoc dan, thuc vat
nang xa » nang x, lang xa, nang ma
tu cai » tu cac, tu can, tu bai
cai ky » cao ky, cac ky, cam ky
xuc va » tuc va, luc va, xac va
vi cua » vai cua, di cua
cua tu » cua tuc, cua su, cua cu

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu cai ky nang xa hoi. hieu qua than ((xuc va) or (((duc va) or (thuc dan)))) hanh vi cua tu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu cai ky nang xa hoi. hieu qua than ((xuc va) OR (((duc va) OR (thuc dan)))) hanh vi cua tu.
• Adding a wildcard symbol may retrieve word variants: tu cai ky nang xa hoi. hieu qua than ((xuc va) or (((duc va) or (thuc dan)))) hanh vi cua tu*.