Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
hang tai » hang va, dung tai
hanh tai » thanh tai, han tai, hinh tai
sach ky » sac ky, sach y, sach ty
thuc va » thuc vat, thuc dan, thuc day
su sach » so sach, vu sach
hieu va » lieu va, hieu qua
nang xa » nang x, lang xa, nang ma
tuc va » truc va, tuc xa, duc va
va cao » va cac, va co, va dao

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