Perhaps you should try some spelling variations:
su triet » su viet, su tien, ve triet
thanh vi » hanh vi, thanh va, thanh ve
hieu van » hieu va, thien van, lieu va
sach ty » sach y, sach tu, sach thu
cuu tre » cua tre, cau tren, cau treo
vu sach » vu bach, su sach, vu khach
dang xa » dang xay, lang xa, dang ha
ty dang » ty xang, ky dang, ty hang
xuc va » duc va, tuc va, luc va

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 ty dang xa hoi. hieu van nam ((xuc va) or (tuc xa)) thanh vi ((cuu tre) or (su triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu sach ty dang xa hoi. hieu van nam ((xuc va) OR (tuc xa)) thanh vi ((cuu tre) OR (su triet)).
• Adding a wildcard symbol may retrieve word variants: vu sach ty dang xa hoi. hieu van nam ((xuc va) or (tuc xa)) thanh vi ((cuu tre) or (su triet))*.