Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
thu sach » thuat sach, thuoc sach, thu hoach
hanh tai » thanh tai, hang tai, han tai
hanh lai » hanh lam, thanh lap, thanh loi
hieu van » hieu va, thien van, lieu va
tu sach » su sach, te sach, tu cach
van cac » van hac, van cau, van bac
nang xa » nang x, lang xa, nang ma
cac dac » cac dan, cac dai, cac bac
dac va » duc va, day va, dat va
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: ((tu sach) OR (thu sach)) y nang xa hoi. hieu van cac dac va ((hanh lai) or (hanh tai)) cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (thu sach)) y nang xa hoi. hieu van cac dac va ((hanh lai) OR (hanh tai)) cua triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sach) OR (thu sach)) y nang xa hoi. hieu van cac dac va ((hanh lai) or (hanh tai)) cua triet".
• Adding a wildcard symbol may retrieve word variants: ((tu sach) OR (thu sach)) y nang xa hoi. hieu van cac dac va ((hanh lai) or (hanh tai)) cua triet*.