Perhaps you should try some spelling variations:
lam truoc » lam thuoc, nam truoc, lam truong
cua triet » cua viet, su triet, va triet
truoc va » truc va, thuoc va, truong va
nang xa » nang x, lang xa, nang ma
hieu va » lieu va
va tinh » may tinh
tinh vi » trinh vi, tinh voi, tinh va
tu sac » tu sach, tu cac, tu san
sac ky » cac ky, sai ky
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 sac ky nang xa hoi. ((hieu va) OR (hieu qua)) lam truoc va tinh vi ((cua triet) or (cua tu))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sac ky nang xa hoi. ((hieu va) OR (hieu qua)) lam truoc va tinh vi ((cua triet) OR (cua tu)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sac ky nang xa hoi. ((hieu va) OR (hieu qua)) lam truoc va tinh vi ((cua triet) or (cua tu))".
• Adding a wildcard symbol may retrieve word variants: tu sac ky nang xa hoi. ((hieu va) OR (hieu qua)) lam truoc va tinh vi ((cua triet) or (cua tu))*.