Perhaps you should try some spelling variations:
va thanh » gia thanh, ban thanh, va tinh
nang mai » nang ma, nang tai, lang mai
chat xuc » chat huu, cam xuc, chao xu
tu sach » thu sach, su sach, te sach
va hanh » van hanh, va danh, ban hanh
ve chat » va chat, van chat
hieu ve » hieu va, hieu van
mai hoi » mai khoi, dai hoi, lai hoi
vu sach » vu bach, su sach, vu khach
vai va » mai va, dai va, hai va
thiet » thieu

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 (vu sach)) ky nang mai hoi. hieu ve chat xuc ((va hanh) OR (va thanh)) vai va thiet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (vu sach)) ky nang mai hoi. hieu ve chat xuc ((va hanh) OR (va thanh)) vai va thiet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sach) or (vu sach)) ky nang mai hoi. hieu ve chat xuc ((va hanh) OR (va thanh)) vai va thiet".
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (vu sach)) ky nang mai hoi. hieu ve chat xuc ((va hanh) OR (va thanh)) vai va thiet*.