Perhaps you should try some spelling variations:
thanh tai » thanh hai, thanh toan, doanh tai
cua triet » cua viet, su triet, va triet
toc sach » hoc sach, doc sach, thuoc sach
hanh tai » hang tai, han tai, hinh tai
tang ha » lang ha, tang ma, trung ha
y tang » ky tang, 6 tang, 7 tang
ha hoi » hoa hoi, ha noi, xa hoi
he nam » nghe nam

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 y tang ha hoi. hieu ((he nam) or (ha nam)) thuc vat ((hanh tai) OR (thanh tai)) cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc sach y tang ha hoi. hieu ((he nam) OR (ha nam)) thuc vat ((hanh tai) OR (thanh tai)) cua triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "toc sach y tang ha hoi. hieu ((he nam) or (ha nam)) thuc vat ((hanh tai) OR (thanh tai)) cua triet".
• Adding a wildcard symbol may retrieve word variants: toc sach y tang ha hoi. hieu ((he nam) or (ha nam)) thuc vat ((hanh tai) OR (thanh tai)) cua triet*.