Perhaps you should try some spelling variations:
hieu van » thien van, lieu va, hieu ve
sach ky » sac ky, sach ty, sach kem
nang xa » nang x, lang xa, nang ma
hieu va » lieu va, hieu qua
lam xuc » cam xuc, lam duoc
va hanh » van hanh, va thanh, va danh
cu tren » tu tren, dua tren
xuc va » duc va, tuc va, luc va
vi cu » vi su, vi xu, vi du

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu ((sach ky) or (sach y)) nang xa hoi. ((hieu van) OR (hieu va)) lam xuc va hanh vi cu tren~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((sach ky) OR (sach y)) nang xa hoi. ((hieu van) OR (hieu va)) lam xuc va hanh vi cu tren.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu ((sach ky) or (sach y)) nang xa hoi. ((hieu van) OR (hieu va)) lam xuc va hanh vi cu tren".
• Adding a wildcard symbol may retrieve word variants: tu ((sach ky) or (sach y)) nang xa hoi. ((hieu van) OR (hieu va)) lam xuc va hanh vi cu tren*.