Perhaps you should try some spelling variations:
va triet » va thiet, va trien, ve triet
hang tai » hang va, dung tai
hanh tai » thanh tai, han tai, hinh tai
cau phuc » cau truc, chau phu, huu phuc
sach ty » sach y, sach tu, sach thu
phuc va » phuc vu, thuc va, chuc va
tu sach » thu sach, su sach, te sach
hieu va » lieu va, hieu qua
hieu ve » hieu van
nang xa » nang x, lang xa, nang ma
ty nang » ky nang, ty xang, ty hang

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

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