Perhaps you should try some spelling variations:
thanh tai » thanh hai, thanh toan, doanh tai
toc sach » hoc sach, doc sach, thuoc sach
kho tang » cao tang
nam thuc » nam thuoc, am thuc, nam thu
thuc day » thuc dan, thuc vat
hanh tai » hang tai, han tai, hinh tai
toc sac » toc san, hoc sach, doc sach
tang xa » trang xa, tang ma, lang xa
hieu va » lieu va, hieu qua
va nam » van nam, ha nam, va nay
cua te » cua tu

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((toc sac) OR (toc sach)) kho tang xa hoi. hieu va nam thuc day ((hanh tai) or (thanh tai)) cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((toc sac) OR (toc sach)) kho tang xa hoi. hieu va nam thuc day ((hanh tai) OR (thanh tai)) cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((toc sac) OR (toc sach)) kho tang xa hoi. hieu va nam thuc day ((hanh tai) or (thanh tai)) cua te".
• Adding a wildcard symbol may retrieve word variants: ((toc sac) OR (toc sach)) kho tang xa hoi. hieu va nam thuc day ((hanh tai) or (thanh tai)) cua te*.