Perhaps you should try some spelling variations:
thanh dat » thanh san, thanh hai, thanh van
suu viet » su viet, sau viet, sieu viet
hanh dao » lanh dao, thanh dam, doanh dao
sach ky » sac ky, sach y, sach ty
tu sach » thu sach, su sach, te sach
may hoi » may thoi, tay hoi, mai hoi
hieu va » hieu qua
ky mang » ky nang, ke mang, ky dang
cao xuc » cam xuc, cao duc, cao suc
xuc va » duc va, tuc va, luc va

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu sach ky mang may hoi. ((hieu va) OR (lieu va)) cao xuc va ((hanh dao) or (thanh dat)) suu viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky mang may hoi. ((hieu va) OR (lieu va)) cao xuc va ((hanh dao) OR (thanh dat)) suu viet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ky mang may hoi. ((hieu va) OR (lieu va)) cao xuc va ((hanh dao) or (thanh dat)) suu viet".
• Adding a wildcard symbol may retrieve word variants: tu sach ky mang may hoi. ((hieu va) OR (lieu va)) cao xuc va ((hanh dao) or (thanh dat)) suu viet*.