Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
toc sach » hoc sach, doc sach, thuoc sach
danh dau » lanh dao, hang dau, danh tu
tang mai » tang ma, tang tai, lang mai
vu cham » va cham, vu kham, tu cham
dau cua » dai cua, day cua, cau cua
va danh » va dinh, va dan, va hanh
mai hoi » mai khoi, dai hoi, lai hoi
ve cham » va cham, ve chat, ve chim
loc va » hoc va, luc va
y tang » ky tang, 6 tang, 7 tang

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((te sach) or (toc sach)) y tang mai hoi. hieu ((ve cham) or (vu cham)) loc va danh dau cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((te sach) OR (toc sach)) y tang mai hoi. hieu ((ve cham) OR (vu cham)) loc va danh dau cua triet.
• Adding a wildcard symbol may retrieve word variants: ((te sach) or (toc sach)) y tang mai hoi. hieu ((ve cham) or (vu cham)) loc va danh dau cua triet*.