Perhaps you should try some spelling variations:
thu sach » tu sach, thuat sach, thuoc sach
van hanh » van thanh, ban hanh, van anh
chat xuc » chat huu, cam xuc, chao xu
nang mai » nang ma, nang tai, lang mai
mai hoi » mai khoi, dai hoi, lai hoi
hieu ve » hieu va, hieu van
xuc van » duc van, luc van, vuc van
su sach » so sach, vu sach
thai va » thai van
ve chat » va chat, van chat
hai va » hai van, hoi va, mai va

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((thu sach) or (su sach)) ky nang mai hoi. hieu ve chat xuc van hanh ((hai va) or (thai va)) thieu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((thu sach) OR (su sach)) ky nang mai hoi. hieu ve chat xuc van hanh ((hai va) OR (thai va)) thieu.
• Adding a wildcard symbol may retrieve word variants: ((thu sach) or (su sach)) ky nang mai hoi. hieu ve chat xuc van hanh ((hai va) or (thai va)) thieu*.