Perhaps you should try some spelling variations:
bach tuoc » sach duoc, sach nuoc
su triet » su tien, ve triet
danh tai » doanh tai, dinh tai, hanh tai
va danh » va dinh, va dan, va hanh
su sach » so sach, vu sach
hieu va » lieu va, hieu qua
bac tuc » bac tu, bac thua
nang xa » nang x, lang xa, nang ma
su viet » so viet
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: su sach y nang xa hoi. hieu va ((bac tuc) or (bach tuoc)) va danh tai ((su triet) OR (su viet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach y nang xa hoi. hieu va ((bac tuc) OR (bach tuoc)) va danh tai ((su triet) OR (su viet)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach y nang xa hoi. hieu va ((bac tuc) or (bach tuoc)) va danh tai ((su triet) OR (su viet))".
• Adding a wildcard symbol may retrieve word variants: su sach y nang xa hoi. hieu va ((bac tuc) or (bach tuoc)) va danh tai ((su triet) OR (su viet))*.