Perhaps you should try some spelling variations:
vao triet » va triet, mao triet, va trien
van hanh » van thanh, ban hanh, van anh
toc sach » hoc sach, doc sach, thuoc sach
nang xa » lang xa, nang ma, mang xa
hieu va » hieu qua
cam luc » cam xuc, cau luc
luc van » luoc van, luu van, duc van
hanh de » hanh ve, hanh kem
sach v » sach va, sach y, sach 2
de vao » de dao, di vao, de tao

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 v ((nang xa) OR (nang x)) hoi. ((hieu va) or (lieu va)) cam luc van hanh de vao triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc sach v ((nang xa) OR (nang x)) hoi. ((hieu va) OR (lieu va)) cam luc van hanh de vao triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "toc sach v ((nang xa) OR (nang x)) hoi. ((hieu va) or (lieu va)) cam luc van hanh de vao triet".
• Adding a wildcard symbol may retrieve word variants: toc sach v ((nang xa) OR (nang x)) hoi. ((hieu va) or (lieu va)) cam luc van hanh de vao triet*.