Perhaps you should try some spelling variations:
nang lap » sang lap, nang lam, nang phap
nang cap » nang cao, nang cham, nang phap
hieu van » hieu va, thien van, lieu va
su sach » so sach, vu sach
danh vi » hanh vi, dinh vi, danh di
hieu ve » hieu va
sach ky » sac ky, sach y, sach ty
va danh » va dinh, va dan, va hanh
vi cua » vai cua, di cua
cua tu » cua tuc, cua su, cua cu
xuc va » duc va, tuc va, luc va

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

• Performing a fuzzy search may retrieve terms with similar spellings: su sach ky ((nang lap) or (nang cap)) hoat. ((hieu ve) OR (hieu van)) cam xuc va danh vi cua tu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ky ((nang lap) OR (nang cap)) hoat. ((hieu ve) OR (hieu van)) cam xuc va danh vi cua tu.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ky ((nang lap) or (nang cap)) hoat. ((hieu ve) OR (hieu van)) cam xuc va danh vi cua tu".
• Adding a wildcard symbol may retrieve word variants: su sach ky ((nang lap) or (nang cap)) hoat. ((hieu ve) OR (hieu van)) cam xuc va danh vi cua tu*.