Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
hac thuc » hoc thuc, thach thuc, thuc thuc
thanh vi » hanh vi, thanh va, thanh ve
va thanh » gia thanh, ban thanh, va tinh
hieu van » hieu va, thien van, lieu va
ha thuc » va thuc, ha thuy, ha thu
sach ty » sach y, sach tu, sach thu
nang xa » nang x, lang xa, nang ma
sac ky » cac ky, sai ky
vi cua » vai cua, di cua

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

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