Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
thanh vi » hanh vi, thanh va, thanh ve
va thanh » gia thanh, ban thanh, va tinh
nang cau » nang cao, hang cau, nang dau
cac xuc » cam xuc, cac nuoc, chat xuc
luu tre » luu tru, cuu tre, luy tre
sach ky » sac ky, sach ty, sach kem
hieu ve » hieu va
xuc va » duc va, tuc va, luc va
vi luu » vi lua

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 ky) or (sach y)) nang cau hoi. ((hieu ve) OR (hieu van)) cac xuc va thanh vi luu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te ((sach ky) OR (sach y)) nang cau hoi. ((hieu ve) OR (hieu van)) cac xuc va thanh vi luu tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te ((sach ky) or (sach y)) nang cau hoi. ((hieu ve) OR (hieu van)) cac xuc va thanh vi luu tre".
• Adding a wildcard symbol may retrieve word variants: te ((sach ky) or (sach y)) nang cau hoi. ((hieu ve) OR (hieu van)) cac xuc va thanh vi luu tre*.