Perhaps you should try some spelling variations:
chat xuc » chat huu, cam xuc, chao xu
hieu van » hieu va, thien van, lieu va
van chat » cao chat
nang mai » nang ma, nang tai, lang mai
mai hoi » mai khoi, dai hoi, lai hoi
su sach » so sach, vu sach
va hanh » van hanh, va thanh, va danh
tu sach » thu sach, te sach, tu cach
xuc va » duc va, tuc va, luc va
vai va » mai va, dai va, lai va
hai va » hai van, thai va, hoi 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) OR (su sach)) ky nang mai hoi. hieu van chat xuc va hanh ((vai va) or (hai va)) thieu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (su sach)) ky nang mai hoi. hieu van chat xuc va hanh ((vai va) OR (hai va)) thieu.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sach) OR (su sach)) ky nang mai hoi. hieu van chat xuc va hanh ((vai va) or (hai va)) thieu".
• Adding a wildcard symbol may retrieve word variants: ((tu sach) OR (su sach)) ky nang mai hoi. hieu van chat xuc va hanh ((vai va) or (hai va)) thieu*.