Perhaps you should try some spelling variations:
thien van » thi van
cua triet » cua viet, su triet, va triet
hieu van » hieu va, lieu va, hieu ve
trung va » truong va, trang va, trung ha
hang tai » hang va, dung tai
tu sach » thu sach, su sach, te sach
nang xa » nang x, lang xa, nang ma
tai cua » thai cua, tai cuc, tri cua
y nang » ky nang, ly nang, v nang
tuc va » thuc va, truc va, tuc xa

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 y nang xa hoi. ((hieu van) OR (thien van)) nam ((tuc va) or (trung va)) hang tai cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach y nang xa hoi. ((hieu van) OR (thien van)) nam ((tuc va) OR (trung va)) hang tai cua triet*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach y nang xa hoi. ((hieu van) OR (thien van)) nam ((tuc va) or (trung va)) hang tai cua triet*".