Perhaps you should try some spelling variations:
cham xuc » cam xuc, chat xuc, cham soc
so viet » hoc viet
va tinh » may tinh
va hanh » van hanh, va thanh, va danh
hieu va » lieu va, hieu qua
va cham » va chat, va tham
nang ma » tang ma, sang ma, nang cao
ma hoi » mai hoi, xa hoi, ma hoa
sac ky » cac ky
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: so ((sac ky) OR (sai ky)) nang ma hoi. hieu va cham xuc ((va hanh) or (va tinh)) va so viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so ((sac ky) OR (sai ky)) nang ma hoi. hieu va cham xuc ((va hanh) OR (va tinh)) va so viet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "so ((sac ky) OR (sai ky)) nang ma hoi. hieu va cham xuc ((va hanh) or (va tinh)) va so viet".
• Adding a wildcard symbol may retrieve word variants: so ((sac ky) OR (sai ky)) nang ma hoi. hieu va cham xuc ((va hanh) or (va tinh)) va so viet*.