Perhaps you should try some spelling variations:
hieu hien » bieu hien, dieu hien, chieu chien
nang tai » hang tai, tang tai, sang tai
cua viet » ca viet, hoa viet, cua vat
nang mai » nang ma, lang mai, nang cai
sach ty » sach y, sach tu, sach thu
cac xuc » cac nuoc, chat xuc, cac cuoc
van anh » van thanh, tuan anh, van minh
su sach » so sach, vu sach
anh vi » hanh vi, anh va, anh ve
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 mai) or (nang tai)) hoi. hieu hien ((cac xuc) or (cam xuc)) van anh vi cua viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ty ((nang mai) OR (nang tai)) hoi. hieu hien ((cac xuc) OR (cam xuc)) van anh vi cua viet.
• Adding a wildcard symbol may retrieve word variants: su sach ty ((nang mai) or (nang tai)) hoi. hieu hien ((cac xuc) or (cam xuc)) van anh vi cua viet*.