Perhaps you should try some spelling variations:
cham xuc » chat xuc, cham soc, pham duc
lang van » dang van, tang van, hoang van
va hanh » van hanh, va thanh, va danh
sach ky » sac ky, sach ty, sach kem
hieu va » lieu va, hieu qua
so viet » hoc viet
van hoi » van hoa, van hoc, van hoe
vi so » vi soi, vi mo, va so

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

• Performing a fuzzy search may retrieve terms with similar spellings: su ((sach ky) or (sach y)) lang van hoi. hieu va ((cham xuc) OR (cam xuc)) va hanh vi so viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su ((sach ky) OR (sach y)) lang van hoi. hieu va ((cham xuc) OR (cam xuc)) va hanh vi so viet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su ((sach ky) or (sach y)) lang van hoi. hieu va ((cham xuc) OR (cam xuc)) va hanh vi so viet".
• Adding a wildcard symbol may retrieve word variants: su ((sach ky) or (sach y)) lang van hoi. hieu va ((cham xuc) OR (cam xuc)) va hanh vi so viet*.