Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
thanh vi » hanh vi, thanh va, thanh ve
va thanh » gia thanh, ban thanh, va tinh
hieu van » hieu va, thien van, lieu va
thu sach » tu sach, thuat sach, thuoc sach
ky dang » ky nang, ky danh
dang xa » dang xay, lang xa, dang ha
nam tuc » nam thuc, nam truc, nam tu
cua tre » cua te, cuu tre, dua tren
su sach » so sach, vu sach
tuc va » thuc va, truc va, tuc xa

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) or (thu sach)) ky dang xa hoi. hieu van nam tuc va thanh vi ((cua tre) OR (cua triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((su sach) OR (thu sach)) ky dang xa hoi. hieu van nam tuc va thanh vi ((cua tre) OR (cua triet)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((su sach) or (thu sach)) ky dang xa hoi. hieu van nam tuc va thanh vi ((cua tre) OR (cua triet))".
• Adding a wildcard symbol may retrieve word variants: ((su sach) or (thu sach)) ky dang xa hoi. hieu van nam tuc va thanh vi ((cua tre) OR (cua triet))*.