Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
thien van » thi van
hanh tai » thanh tai, hang tai, han tai
hieu van » hieu va, lieu va, hieu ve
hanh lai » hanh lam, thanh lap, thanh loi
te sach » toc sach
cac duc » cac du, cao duc, cac dac
sach ty » sach y, sach tu, sach thu
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.

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