Perhaps you should try some spelling variations:
nganh hang » ngan hang, nhanh thang, nganh thanh
luc nganh » luc ngan, chuc nganh, luat nganh
hieu van » hieu va, thien van, lieu va
cam luc » cam xuc, cau luc
sach ty » sach y, sach tu, sach thu
su sach » so sach, vu sach
hieu ve » hieu va
nang xa » nang x, lang xa, nang ma
ty nang » ky nang, ty xang, ty hang
vi dau » va dau, bi dau, ve dau
vi dai » si dai, li dai, vien dai

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 ty nang xa hoi. ((hieu ve) OR (hieu van)) cam luc nganh hang ((vi dau) or (vi dai)) tren~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ty nang xa hoi. ((hieu ve) OR (hieu van)) cam luc nganh hang ((vi dau) OR (vi dai)) tren.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ty nang xa hoi. ((hieu ve) OR (hieu van)) cam luc nganh hang ((vi dau) or (vi dai)) tren".
• Adding a wildcard symbol may retrieve word variants: su sach ty nang xa hoi. ((hieu ve) OR (hieu van)) cam luc nganh hang ((vi dau) or (vi dai)) tren*.