Perhaps you should try some spelling variations:
nam trung » nam trong, tai trung, ba trung
trung va » truong va, trang va, trung ha
su triet » su viet, ve triet
su sach » so sach, vu sach
nang xa » nang x, lang xa, nang ma
hieu ve » hieu va, hieu van
va hanh » van hanh, va thanh, va danh
hanh va » hang va, hanh vi
su tien » su hien, tu tieng, dau tien
sach v » sach va, sach y, sach 2
v nang » va nang, vu nang, van nang
ve nam » he nam, va nam, le nam
kien » bien, vien, dien

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 v nang xa hoi. hieu ve nam trung va hanh va ((su triet) or (((su tien) OR (su kien))))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach v nang xa hoi. hieu ve nam trung va hanh va ((su triet) OR (((su tien) OR (su kien)))).
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach v nang xa hoi. hieu ve nam trung va hanh va ((su triet) or (((su tien) OR (su kien))))".
• Adding a wildcard symbol may retrieve word variants: su sach v nang xa hoi. hieu ve nam trung va hanh va ((su triet) or (((su tien) OR (su kien))))*.