Perhaps you should try some spelling variations:
sang ma » tang ma, sang tao, mang may
doi cua » dai cua, hoi cua
dan doi » dan hoi, dan toi, van doi
cao loc » cao hoc, cao toc, cao oc
cua tre » cua te, cuu tre, cua triet
nang ma » tang ma, nang cao, mang may
sach v » sach va, sach 2, sach vay
va cao » va cac, va co, va dao
loc va » hoc va, luc va
va dan » ca dan, va dao, va dau

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

• Performing a fuzzy search may retrieve terms with similar spellings: toc ((sach v) or (sach y)) ((nang ma) or (sang ma)) hoi. lieu va cao loc va dan doi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc ((sach v) OR (sach y)) ((nang ma) OR (sang ma)) hoi. lieu va cao loc va dan doi cua tre.
• Adding a wildcard symbol may retrieve word variants: toc ((sach v) or (sach y)) ((nang ma) or (sang ma)) hoi. lieu va cao loc va dan doi cua tre*.