Perhaps you should try some spelling variations:
ban thanh » ban hanh, ban hang
va thanh » gia thanh, va tinh, le thanh
nang cau » nang cao, hang cau, nang dau
hieu van » hieu va, thien van, lieu va
te sach » toc sach
cac xuc » cam xuc, cac nuoc, chat xuc
sach ky » sac ky, sach y, sach ty
hieu ve » hieu va
luu tre » luu tru, cuu tre, luy tre
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 nang cau hoi. ((hieu ve) OR (hieu van)) cac xuc ((va thanh) or (ban thanh)) vi luu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ky nang cau hoi. ((hieu ve) OR (hieu van)) cac xuc ((va thanh) OR (ban thanh)) vi luu tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ky nang cau hoi. ((hieu ve) OR (hieu van)) cac xuc ((va thanh) or (ban thanh)) vi luu tre".
• Adding a wildcard symbol may retrieve word variants: te sach ky nang cau hoi. ((hieu ve) OR (hieu van)) cac xuc ((va thanh) or (ban thanh)) vi luu tre*.