Perhaps you should try some spelling variations:
thanh tai » thanh hai, thanh toan, doanh tai
doc sach » hoc sach, toc sach, nuoc sach
hanh tai » hang tai, han tai, hinh tai
ky tang » ky nang, ky dang, kho tang
tang xa » trang xa, tang ma, lang xa
hieu va » lieu va, hieu qua
sach ky » sac ky, sach y, sach ty
cua te » cua tu
tuc va » thuc va, truc va, tuc xa
va cao » va cac, va co, va dao

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 ky tang xa hoi. hieu va cao ((tuc va) or (thuc vat)) ((hanh tai) or (thanh tai)) cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doc sach ky tang xa hoi. hieu va cao ((tuc va) OR (thuc vat)) ((hanh tai) OR (thanh tai)) cua te.
• Adding a wildcard symbol may retrieve word variants: doc sach ky tang xa hoi. hieu va cao ((tuc va) or (thuc vat)) ((hanh tai) or (thanh tai)) cua te*.