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
nhan luc » nang luc
dau cua » dai cua, day cua, cau cua
va danh » va dinh, va dan, va hanh
ky tang » ky nang, ky dang, kho tang
tang ma » mang may, tang van
hieu va » lieu va
ma hoi » mai hoi, xa hoi, ma hoa
luc va » duc va, tuc va, loc va

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)) ky tang ma hoi. ((hieu va) or (hieu qua)) nhan luc va danh dau cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((te sach) OR (toc sach)) ky tang ma hoi. ((hieu va) OR (hieu qua)) nhan luc va danh dau cua triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((te sach) OR (toc sach)) ky tang ma hoi. ((hieu va) or (hieu qua)) nhan luc va danh dau cua triet".
• Adding a wildcard symbol may retrieve word variants: ((te sach) OR (toc sach)) ky tang ma hoi. ((hieu va) or (hieu qua)) nhan luc va danh dau cua triet*.