Perhaps you should try some spelling variations:
thien van » thi van
hanh hai » thanh hai, nhanh hai, hang hai
te sach » toc sach
sach ty » sach y, sach tu, sach thu
ty nang » ky nang, ty xang, ty hang
nang ma » tang ma, sang ma, nang cao
hai cua » thai cua, dai cua, hoi cua
cua tre » cua te, cuu tre, cua triet
ma hoi » mai hoi, xa hoi, ma hoa
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: te sach ty nang ma hoi. ((lieu va) or (thien van)) cam ((xuc va) or (thuc vat)) hanh hai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ty nang ma hoi. ((lieu va) OR (thien van)) cam ((xuc va) OR (thuc vat)) hanh hai cua tre.
• Adding a wildcard symbol may retrieve word variants: te sach ty nang ma hoi. ((lieu va) or (thien van)) cam ((xuc va) or (thuc vat)) hanh hai cua tre*.