Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
hieu van » hieu va, thien van, lieu va
vu sach » vu bach, su sach, vu khach
dang xa » dang xay, lang xa, dang ha
nam tuc » nam thuc, nam truc, nam tu
va tinh » may tinh
tinh vi » trinh vi, tinh voi, tinh va
cuu tre » cua tre, cau tren, cau treo
y dang » ky dang, 2 dang, _ dang
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: vu sach y dang xa hoi. hieu van nam tuc va tinh vi ((cuu tre) or (cua triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu sach y dang xa hoi. hieu van nam tuc va tinh vi ((cuu tre) OR (cua triet)).
• Adding a wildcard symbol may retrieve word variants: vu sach y dang xa hoi. hieu van nam tuc va tinh vi ((cuu tre) or (cua triet))*.