Perhaps you should try some spelling variations:
nhan tuc » nhan thuc, nhan luc, nhanh thuc
mat cua » ma cua, manh cua, mang cua
cat cua » chat cua, ca cua, cau cua
va hanh » van hanh, va thanh, va danh
su sach » so sach, vu sach
hieu va » lieu va, hieu qua
va nhan » van nhan, ca nhan, va phan
y nang » ky nang, ly nang, may nang
tuc va » thuc va, truc va, tuc xa
v nang » va nang, vu nang, van nang

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

• Performing a fuzzy search may retrieve terms with similar spellings: su sach ((y nang) OR (v nang)) xa hoi. hieu va nhan tuc va hanh ((cat cua) or (mat cua)) triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ((y nang) OR (v nang)) xa hoi. hieu va nhan tuc va hanh ((cat cua) OR (mat cua)) triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ((y nang) OR (v nang)) xa hoi. hieu va nhan tuc va hanh ((cat cua) or (mat cua)) triet".
• Adding a wildcard symbol may retrieve word variants: su sach ((y nang) OR (v nang)) xa hoi. hieu va nhan tuc va hanh ((cat cua) or (mat cua)) triet*.