Perhaps you should try some spelling variations:
nganh hang » ngan hang, nhanh thang, nganh thanh
luc nganh » luc ngan, chuc nganh, luat nganh
dau tien » van tien
hieu van » hieu va, thien van, lieu va
dau tren » dat tren, dau tieng, dau trong
hang di » hang doi, hang vi, hang dien
cam luc » cam xuc, cau luc
su sach » so sach, vu sach
sach ty » sach y, sach tu, sach thu
hieu ve » hieu va
nang xa » nang x, lang xa, nang ma
ty nang » ky nang, ty xang, ty hang

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 di ((dau tren) OR (dau tien))~.
• 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 di ((dau tren) OR (dau tien)).
• 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 di ((dau tren) OR (dau tien))".
• Adding a wildcard symbol may retrieve word variants: su sach ty nang xa hoi. ((hieu ve) or (hieu van)) cam luc nganh hang di ((dau tren) OR (dau tien))*.