Perhaps you should try some spelling variations:
thanh va » thanh van, hanh va, thanh ha
dang xay » dang van, van xay
hieu van » hieu va, thien van, lieu va
thanh vi » hanh vi, thanh ve, nhanh vi
vu sach » vu bach, su sach, vu khach
truc va » thuc va, thuc vat, trung va
cua tre » cua te, cuu tre, cua triet
sach ky » sac ky, sach y, sach ty
van hac » van hoc, van ha, van hai
xay hoi » xa hoi, tay hoi, cay phoi
ky dang » ky nang, ky danh
tuc va » thuc va, tuc xa, duc 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 ky dang xay hoi. hieu van hac ((tuc va) or (truc va)) ((thanh vi) or (thanh va)) cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu sach ky dang xay hoi. hieu van hac ((tuc va) OR (truc va)) ((thanh vi) OR (thanh va)) cua tre.
• Adding a wildcard symbol may retrieve word variants: vu sach ky dang xay hoi. hieu van hac ((tuc va) or (truc va)) ((thanh vi) or (thanh va)) cua tre*.