Perhaps you should try some spelling variations:
thanh dai » thanh hai, thanh tai, thanh dat
cua triet » cua viet, va triet
su triet » su viet, su tien, ve triet
va thanh » gia thanh, ban thanh, va tinh
hieu van » hieu va, thien van, lieu va
chat tuc » chat xuc, chat huu, chat cua
luat tuc » luat thue
su sach » so sach, vu sach
nang xa » nang x, lang xa, nang ma
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: su sach y nang xa hoi. hieu van ((chat tuc) OR (luat tuc)) va thanh dai ((cua triet) or (su triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach y nang xa hoi. hieu van ((chat tuc) OR (luat tuc)) va thanh dai ((cua triet) OR (su triet)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach y nang xa hoi. hieu van ((chat tuc) OR (luat tuc)) va thanh dai ((cua triet) or (su triet))".
• Adding a wildcard symbol may retrieve word variants: su sach y nang xa hoi. hieu van ((chat tuc) OR (luat tuc)) va thanh dai ((cua triet) or (su triet))*.