Perhaps you should try some spelling variations:
chat xuc » chat huu, cam xuc, chao xu
cham xuc » cam xuc, cham soc, pham duc
hanh va » hang va, hanh vi
va hanh » van hanh, va thanh, va danh
sach ky » sac ky, sach ty, sach kem
hieu va » lieu va, hieu qua
lang ha » long ha
so viet » hoc viet
ha hoi » hoa hoi, ha noi, xa hoi
va so » ma so, va su, va co

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