Perhaps you should try some spelling variations:
thien van » thi van
thanh vi » thanh va, thanh ve, nhanh vi
mai van » mai va, hai van, mai quan
nam mai » nam tai, nam hai, nam lai
sach ty » sach y, sach tu, sach thu
tu sach » thu sach, su sach, te sach
nang ma » tang ma, sang ma, nang cao
nang xa » nang x, lang xa, mang xa
cua tre » cua te, cuu tre, cua triet

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: tu sach ty ((nang xa) or (nang ma)) hoi. thien van nam mai van ((thanh vi) or (hanh vi)) cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ty ((nang xa) OR (nang ma)) hoi. thien van nam mai van ((thanh vi) OR (hanh vi)) cua tre.
• Adding a wildcard symbol may retrieve word variants: tu sach ty ((nang xa) or (nang ma)) hoi. thien van nam mai van ((thanh vi) or (hanh vi)) cua tre*.