Perhaps you should try some spelling variations:
thanh tai » thanh hai, thanh toan, doanh tai
doc sach » hoc sach, toc sach, nuoc sach
chat cuu » chat huu, chat cua, cham cuu
hanh tai » hang tai, han tai, hinh tai
sach ly » sach y, sach lo, sach ty
ly hang » ly quang
hieu va » lieu va, hieu qua
va chat » van chat, va phat, cao chat
va hoi » xa hoi, va hoc, va hoa

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

• Performing a fuzzy search may retrieve terms with similar spellings: doc sach ly hang va hoi. hieu va chat cuu van ((((hanh tai) or (thanh tai))) or (hanh vi)) cua vat~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doc sach ly hang va hoi. hieu va chat cuu van ((((hanh tai) OR (thanh tai))) OR (hanh vi)) cua vat.
• Adding a wildcard symbol may retrieve word variants: doc sach ly hang va hoi. hieu va chat cuu van ((((hanh tai) or (thanh tai))) or (hanh vi)) cua vat*.