Perhaps you should try some spelling variations:
luc ngan » luc nganh, luc nhan, luat ngan
hieu van » hieu va, thien van, lieu va
thu sach » thuat sach, thuoc sach, thu hoach
ty nang » ky nang, ty xang, ty hang
nang xa » nang x, lang xa, nang ma
van cam » van nam, van lam, van cau
cam luc » cam xuc, cau luc
tu sach » su sach, te sach, tu cach
va dao » ca dao
hang » dang, bang, hanh

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