Perhaps you should try some spelling variations:
thien chien » thien nhien
van hanh » van thanh, ban hanh, van anh
cua viet » ca viet, hoa viet, cua vat
sach ty » sach y, sach tu, sach thu
nang ma » tang ma, sang ma, mang may
cac xuc » cac nuoc, chat xuc, cac cuoc
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 ma) OR (nang cao)) hoi. thien chien ((cac xuc) 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 ma) OR (nang cao)) hoi. thien chien ((cac xuc) 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 ma) OR (nang cao)) hoi. thien chien ((cac xuc) or (cam xuc)) van hanh vi cua viet".
• Adding a wildcard symbol may retrieve word variants: te sach ty ((nang ma) OR (nang cao)) hoi. thien chien ((cac xuc) or (cam xuc)) van hanh vi cua viet*.