Perhaps you should try some spelling variations:
va triet » va thiet, va trien, ve triet
hanh lai » hanh lam, hanh tai, thanh lap
chat duc » chat xuc, chat doc, chet duoc
hieu van » hieu va, thien van, lieu va
van chat » cao chat
sach thu » sach thue, sach thieu, sach tham
nang xa » nang x, lang xa, nang ma
sach ty » sach y, sach tu, xach tay
hanh va » hang va, hanh vi

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 ty) or (sach thu)) nang xa hoi. hieu van chat duc tan ((hanh lai) or (hanh va)) va triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((sach ty) OR (sach thu)) nang xa hoi. hieu van chat duc tan ((hanh lai) OR (hanh va)) va triet.
• Adding a wildcard symbol may retrieve word variants: tu ((sach ty) or (sach thu)) nang xa hoi. hieu van chat duc tan ((hanh lai) or (hanh va)) va triet*.