Perhaps you should try some spelling variations:
thi hang » thi hanh, thi nang, thi hong
te sach » toc sach
ty lang » tay lang, ty xang, ty hang
tu lang » cu lang, tu lanh, xu lang
lap doc » lap doi, lap dong, phap doc
va hang » van hang, va nang, va lang
cua tre » cua te, cuu tre, cua triet
va lap » va dap
doc va » duoc va, hoc va, duc va
va cua » va chua, via cua, ca cua

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 lang) or (tu lang))) or (thi hang)) xa hoi. lieu va lap doc va hang va cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ((((ty lang) OR (tu lang))) OR (thi hang)) xa hoi. lieu va lap doc va hang va cua tre.
• Adding a wildcard symbol may retrieve word variants: te sach ((((ty lang) or (tu lang))) or (thi hang)) xa hoi. lieu va lap doc va hang va cua tre*.