Perhaps you should try some spelling variations:
thanh dai » thanh hai, thanh tai, thanh dat
mai khoi » mai khoa, tai khoa, cac khoi
va thanh » gia thanh, ban thanh, va tinh
cam duc » cam xuc, cao duc, pham duc
hieu va » lieu va, hieu qua
te sach » toc sach
mai hoi » lai hoi, mai doi, mai hoa
dai hoi » dai hoc, dai hai, dai moi
su viet » so viet
y nang » ky nang, ly nang, v nang
va cam » va cham, va cac, va cao
dai su » dai sua, dai so, dan su

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 y nang ((((mai hoi) OR (dai hoi))) OR (mai khoi)). hieu va cam duc va thanh dai su viet~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach y nang ((((mai hoi) OR (dai hoi))) OR (mai khoi)). hieu va cam duc va thanh dai su viet".
• Adding a wildcard symbol may retrieve word variants: te sach y nang ((((mai hoi) OR (dai hoi))) OR (mai khoi)). hieu va cam duc va thanh dai su viet*.