Perhaps you should try some spelling variations:
kham duc » pham duc, kham cuoc, pham duy
te sach » toc sach
hieu ve » hieu va, hieu van
day cua » dai cua
dan day » da day, dan dat, dan da
cua tre » cua te, cuu tre, cua triet
sach ky » sac ky, sach y, sach ty
hieu su » hieu sau, tieu su, hieu so
va dan » ca dan, va dao, va dau
me hoi » le hoi

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 ky nang ((me hoi) or (xa hoi)). ((hieu su) or (hieu ve)) kham duc va dan day cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ky nang ((me hoi) OR (xa hoi)). ((hieu su) OR (hieu ve)) kham duc va dan day cua tre.
• Adding a wildcard symbol may retrieve word variants: te sach ky nang ((me hoi) or (xa hoi)). ((hieu su) or (hieu ve)) kham duc va dan day cua tre*.