Perhaps you should try some spelling variations:
thien chien » thien nhien
van hanh » van thanh, ban hanh, van anh
cac nuoc » cap nuoc, hoc nuoc, dat nuoc
te sach » toc sach
sach ty » sach y, sach tu, sach thu
ca viet » va viet, co viet, hoa viet
cac xuc » chat xuc, cac cuoc, cac quoc
nang ma » tang ma, sang ma, nang cao
ty nang » ky nang, ty xang, ty hang
ma hoi » mai hoi, xa hoi, ma hoa
vi ca » vit ca, li ca, va ca

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 hoi. thien chien ((((cac xuc) OR (cac nuoc))) or (cam xuc)) van hanh vi ca viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ty nang ma hoi. thien chien ((((cac xuc) OR (cac nuoc))) OR (cam xuc)) van hanh vi ca viet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ty nang ma hoi. thien chien ((((cac xuc) OR (cac nuoc))) or (cam xuc)) van hanh vi ca viet".
• Adding a wildcard symbol may retrieve word variants: te sach ty nang ma hoi. thien chien ((((cac xuc) OR (cac nuoc))) or (cam xuc)) van hanh vi ca viet*.