Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
vanh tai » hanh tai, anh tai, vanh dai
sach ky » sac ky, sach y, sach kem
van tai » von tai, van tuan
cam luc » cam xuc, cau luc
hieu va » lieu va, hieu qua
nang xa » nang x, lang xa, nang ma
sach ty » sach y, sach tu, sach thu
luc va » duc va, tuc va, loc va
va cam » va cham, va cac, va cao

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu ((sach ky) OR (sach ty)) nang xa hoi. hieu va cam luc va ((vanh tai) or (van tai)) cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((sach ky) OR (sach ty)) nang xa hoi. hieu va cam luc va ((vanh tai) OR (van tai)) cua triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu ((sach ky) OR (sach ty)) nang xa hoi. hieu va cam luc va ((vanh tai) or (van tai)) cua triet".
• Adding a wildcard symbol may retrieve word variants: tu ((sach ky) OR (sach ty)) nang xa hoi. hieu va cam luc va ((vanh tai) or (van tai)) cua triet*.