Perhaps you should try some spelling variations:
bieu hien » dieu hien, dieu khien, bien phien
ban thanh » ban hanh, ban hang
hieu hien » dieu hien, chieu chien, dieu khien
thanh vi » hanh vi, thanh va, thanh ve
nang tai » hang tai, tang tai, sang tai
cac xuc » cac nuoc, chat xuc, cac cuoc
su sach » so sach, vu sach
sach ty » sach y, sach tu, sach thu
tai hoi » tai khoi, dai hoi, tai hai
ty nang » ky nang, ty xang, ty hang
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: su sach ty nang tai hoi. ((hieu hien) OR (bieu hien)) ((cac xuc) or (cam xuc)) ban thanh vi cua vat~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ty nang tai hoi. ((hieu hien) OR (bieu hien)) ((cac xuc) OR (cam xuc)) ban thanh vi cua vat.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ty nang tai hoi. ((hieu hien) OR (bieu hien)) ((cac xuc) or (cam xuc)) ban thanh vi cua vat".
• Adding a wildcard symbol may retrieve word variants: su sach ty nang tai hoi. ((hieu hien) OR (bieu hien)) ((cac xuc) or (cam xuc)) ban thanh vi cua vat*.