Perhaps you should try some spelling variations:
te sach » toc sach
sach ty » sach y, sach tu, sach thu
ty nang » ky nang, ty xang, ty hang
hieu va » hieu qua
dan lai » dan loai, dan lat, dan li
dan lap » phan lap, dan luan
cua tre » cua te, cuu tre, cua triet
x hoi » xa hoi, o hoi, x ho

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 x hoi. ((hieu va) OR (lieu va)) pham duc va ((dan lai) or (dan lap)) cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ty nang x hoi. ((hieu va) OR (lieu va)) pham duc va ((dan lai) OR (dan lap)) cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ty nang x hoi. ((hieu va) OR (lieu va)) pham duc va ((dan lai) or (dan lap)) cua tre".
• Adding a wildcard symbol may retrieve word variants: te sach ty nang x hoi. ((hieu va) OR (lieu va)) pham duc va ((dan lai) or (dan lap)) cua tre*.