Perhaps you should try some spelling variations:
hieu hien » bieu hien, dieu hien, chieu chien
van thanh » ban thanh
cua viet » ca viet, hoa viet, cua vat
nang dau » hang dau, xang dau, nang du
van tuan » van quan, van ban, anh tuan
tu sach » thu sach, su sach, te sach
sach tu » sach thu, cach tu, sach ty
cac xuc » cac nuoc, chat xuc, cac cuoc
dau hoi » cau hoi, dai hoi, dan hoi
tu nang » tru nang, tu nong, tu nano
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: tu sach tu nang dau hoi. hieu hien ((cac xuc) or (cam xuc)) ((van thanh) or (van tuan)) vi cua viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach tu nang dau hoi. hieu hien ((cac xuc) OR (cam xuc)) ((van thanh) OR (van tuan)) vi cua viet.
• Adding a wildcard symbol may retrieve word variants: tu sach tu nang dau hoi. hieu hien ((cac xuc) or (cam xuc)) ((van thanh) or (van tuan)) vi cua viet*.