Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
cap nuoc » dat nuoc
va thanh » gia thanh, ban thanh, va tinh
tu sach » thu sach, su sach, te sach
cao hoi » cau hoi, co hoi, cao hoc
cac xuc » cam xuc, cac nuoc, chat xuc
lap cua » lai cua, tap cua, ap cua
lam cua » nam cua, lam chat
y nang » ky nang, ly nang, v nang

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 y nang cao hoi. hieu van ((cac xuc) or (cap nuoc)) va thanh ((lap cua) OR (lam cua)) triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach y nang cao hoi. hieu van ((cac xuc) OR (cap nuoc)) va thanh ((lap cua) OR (lam cua)) triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach y nang cao hoi. hieu van ((cac xuc) or (cap nuoc)) va thanh ((lap cua) OR (lam cua)) triet".
• Adding a wildcard symbol may retrieve word variants: tu sach y nang cao hoi. hieu van ((cac xuc) or (cap nuoc)) va thanh ((lap cua) OR (lam cua)) triet*.