Perhaps you should try some spelling variations:
danh ben » danh yen, danh kien, doanh ban
xach tay » canh tay
ben cua » benh cua, ban cua, gen cua
hieu va » lieu va, hieu qua
cao hoi » cau hoi, co hoi, cao hoc
sach tu » sach thu, cach tu, sach ty
cua tre » cua te, cuu tre, cua triet
tac va » tac da, tac xa, tac ha
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: te ((xach tay) or (sach tu)) nang cao hoi. hieu va cac ((tac va) OR (tuc va)) danh ben cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te ((xach tay) OR (sach tu)) nang cao hoi. hieu va cac ((tac va) OR (tuc va)) danh ben cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te ((xach tay) or (sach tu)) nang cao hoi. hieu va cac ((tac va) OR (tuc va)) danh ben cua tre".
• Adding a wildcard symbol may retrieve word variants: te ((xach tay) or (sach tu)) nang cao hoi. hieu va cac ((tac va) OR (tuc va)) danh ben cua tre*.