Perhaps you should try some spelling variations:
mai khoi » mai khoa, tai khoa, cac khoi
cham xuc » cam xuc, chat xuc, cham soc
day cua » dai cua
dan day » da day, dan dat, dan da
vu cham » va cham, vu kham, tu cham
hieu vu » hieu va, hieu ve, hieu su
te sach » toc sach
sach ky » sac ky, sach y, sach ty
mai hoi » dai hoi, lai hoi, mai doi
cua tre » cua te, cuu tre, cua triet
xuc va » duc va, tuc va, luc va
va dan » ca dan, va dao, va dau
ma hoi » xa hoi, ma hoa, me hoi

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 ky nang ((ma hoi) or (((mai hoi) OR (mai khoi)))). hieu vu cham xuc va dan day cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ky nang ((ma hoi) OR (((mai hoi) OR (mai khoi)))). hieu vu cham xuc va dan day cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ky nang ((ma hoi) or (((mai hoi) OR (mai khoi)))). hieu vu cham xuc va dan day cua tre".
• Adding a wildcard symbol may retrieve word variants: te sach ky nang ((ma hoi) or (((mai hoi) OR (mai khoi)))). hieu vu cham xuc va dan day cua tre*.