Perhaps you should try some spelling variations:
ve triet » va trien, su triet
cham tuc » nham thuc, pham thuc, tham thuc
va hanh » van hanh, va thanh, ban hanh
cua tre » cua te, cuu tre, cua triet
te sach » toc sach
va danh » va dinh, va dan, dia danh
va cham » va chat, va tham
hieu va » lieu va, hieu qua
nang ma » tang ma, sang ma, nang cao
y nang » ky nang, ly nang, v nang

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 y nang ma hoa. hieu va cham tuc ((va danh) OR (va hanh)) dau ((cua tre) or (ve triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach y nang ma hoa. hieu va cham tuc ((va danh) OR (va hanh)) dau ((cua tre) OR (ve triet)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach y nang ma hoa. hieu va cham tuc ((va danh) OR (va hanh)) dau ((cua tre) or (ve triet))".
• Adding a wildcard symbol may retrieve word variants: te sach y nang ma hoa. hieu va cham tuc ((va danh) OR (va hanh)) dau ((cua tre) or (ve triet))*.