Perhaps you should try some spelling variations:
thien van » thi van
hieu van » hieu va, lieu va, hieu ve
cham xuc » chat xuc, cham soc, pham duc
cau tren » cu tren, dau tren, ca tren
co sach » bo sach, cuon sach, hoc sach
sach ky » sac ky, sach y, sach ty
va hanh » van hanh, va thanh, va danh
vi cau » va cau, ve cau, di cau
x hoi » xa hoi, o hoi, x ho

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: co sach ky nang x hoi. ((hieu van) OR (thien van)) ((cham xuc) OR (cam xuc)) va hanh vi cau tren~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "co sach ky nang x hoi. ((hieu van) OR (thien van)) ((cham xuc) OR (cam xuc)) va hanh vi cau tren".
• Adding a wildcard symbol may retrieve word variants: co sach ky nang x hoi. ((hieu van) OR (thien van)) ((cham xuc) OR (cam xuc)) va hanh vi cau tren*.