Perhaps you should try some spelling variations:
thu sach » tu sach, thuat sach, thuoc sach
hieu van » hieu va, thien van, lieu va
sach ky » sac ky, sach y, sach ty
nang xa » nang x, lang xa, nang ma
van cam » van nam, van lam, van cau
danh vi » hanh vi, dinh vi, danh di
cu tren » tu tren, dua tren
xuc va » duc va, luc va, xac va
tuc va » thuc va, truc va, tuc xa
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: thu sach ky nang xa hoi. hieu van cam ((xuc va) or (tuc va)) danh vi cu tren~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach ky nang xa hoi. hieu van cam ((xuc va) OR (tuc va)) danh vi cu tren.
• Adding a wildcard symbol may retrieve word variants: thu sach ky nang xa hoi. hieu van cam ((xuc va) or (tuc va)) danh vi cu tren*.