Perhaps you should try some spelling variations:
bieu hien » dieu hien, dieu khien, bien phien
van hanh » van thanh, ban hanh, van anh
cap nuoc » dat nuoc
cua viet » ca viet, hoa viet, cua vat
hang tai » hang va, dung tai
nang tai » tang tai, sang tai, nang cao
sach ty » sach y, sach tu, sach thu
te sach » toc sach
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: te sach ty ((nang tai) OR (hang tai)) hoi. bieu hien ((cap nuoc) or (cam xuc)) van hanh vi cua viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ty ((nang tai) OR (hang tai)) hoi. bieu hien ((cap nuoc) OR (cam xuc)) van hanh vi cua viet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ty ((nang tai) OR (hang tai)) hoi. bieu hien ((cap nuoc) or (cam xuc)) van hanh vi cua viet".
• Adding a wildcard symbol may retrieve word variants: te sach ty ((nang tai) OR (hang tai)) hoi. bieu hien ((cap nuoc) or (cam xuc)) van hanh vi cua viet*.