Perhaps you should try some spelling variations:
lam truoc » lam thuoc, nam truoc, lam truong
thuat san » thuat toan, thuat song, thuat lanh
truoc va » truc va, thuoc va, truong va
nang xa » nang x, lang xa, nang ma
hieu va » lieu va, hieu qua
va hanh » van hanh, va thanh, va danh
voi hoa » voi hoat, voi khoa, boi hoa
san ky » sang ky, van ky, dan ky
va lam » van lam, va lap
vi hoa » va hoa, bi hoa, vi ha
vi hoc » li hoc, va hoc

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

• Performing a fuzzy search may retrieve terms with similar spellings: thuat san ky nang xa hoi. hieu va lam truoc va hanh ((((vi hoa) OR (voi hoa))) or (vi hoc)) viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thuat san ky nang xa hoi. hieu va lam truoc va hanh ((((vi hoa) OR (voi hoa))) OR (vi hoc)) viet*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thuat san ky nang xa hoi. hieu va lam truoc va hanh ((((vi hoa) OR (voi hoa))) or (vi hoc)) viet*".