Perhaps you should try some spelling variations:
thanh va » thanh van, hanh va, thanh ha
thanh vi » hanh vi, thanh ve, nhanh vi
vu sach » vu bach, su sach, vu khach
sach ky » sac ky, sach y, sach ty
cua tre » cua te, cuu tre, cua triet
van hai » van chat, van hanh, van phan
lang xa » lang ha, dang xay, lang van
ky lang » ky nang, ky dang, ky tang
van ha » van hoa, van chat, van hanh
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 ky lang xa hoi. hieu ((van hai) OR (van ha)) tuc va ((thanh vi) or (thanh va)) cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu sach ky lang xa hoi. hieu ((van hai) OR (van ha)) tuc va ((thanh vi) OR (thanh va)) cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "vu sach ky lang xa hoi. hieu ((van hai) OR (van ha)) tuc va ((thanh vi) or (thanh va)) cua tre".
• Adding a wildcard symbol may retrieve word variants: vu sach ky lang xa hoi. hieu ((van hai) OR (van ha)) tuc va ((thanh vi) or (thanh va)) cua tre*.