Perhaps you should try some spelling variations:
van hanh » van thanh, ban hanh, van anh
thu sach » tu sach, thuat sach, thuoc sach
chat xuc » chat huu, cam xuc, chao xu
hieu va » lieu va, hieu qua
va hanh » va thanh, va danh, ban hanh
va chat » van chat, va phat, cao chat
tu cach » tu cac
lang ha » long ha
ky lang » ky nang, ky dang, ky tang
ha hoi » hoa hoi, ha noi, xa hoi
vi luu » vi lua
tru » truc

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((tu cach) or (thu sach)) ky lang ha hoi. hieu va chat xuc ((va hanh) or (van hanh)) vi luu tru~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu cach) OR (thu sach)) ky lang ha hoi. hieu va chat xuc ((va hanh) OR (van hanh)) vi luu tru.
• Adding a wildcard symbol may retrieve word variants: ((tu cach) or (thu sach)) ky lang ha hoi. hieu va chat xuc ((va hanh) or (van hanh)) vi luu tru*.