Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, hieu ve
tu sach » thu sach, su sach, te sach
sach ky » sac ky, sach y, sach ty
va hanh » van hanh, va thanh, va danh
cu tren » tu tren, dua tren
xuc va » duc va, tuc va, luc va
x hoi » xa hoi, o hoi, x ho
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 nang x hoi. ((hieu van) or (lieu va)) cam xuc va hanh vi cu tren~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky nang x hoi. ((hieu van) OR (lieu va)) cam xuc va hanh vi cu tren.
• Adding a wildcard symbol may retrieve word variants: tu sach ky nang x hoi. ((hieu van) or (lieu va)) cam xuc va hanh vi cu tren*.