Perhaps you should try some spelling variations:
chat xuc » chat huu, cam xuc, chao xu
thu sach » thuat sach, thuoc sach, thu hoach
tu sach » su sach, te sach, tu cach
va chat » van chat, va phat, cao chat
hieu va » lieu va, hieu qua
nang ma » tang ma, sang ma, nang cao
nang xa » nang x, lang xa, mang xa
han tri » han tai, van tri, thanh tri
xuc va » duc va, tuc va, luc va
va han » va phan, van han, va hanh
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 (thu sach)) ky ((nang xa) or (nang ma)) hoi. hieu va chat xuc va han tri va thiet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (thu sach)) ky ((nang xa) OR (nang ma)) hoi. hieu va chat xuc va han tri va thiet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sach) OR (thu sach)) ky ((nang xa) or (nang ma)) hoi. hieu va chat xuc va han tri va thiet".
• Adding a wildcard symbol may retrieve word variants: ((tu sach) OR (thu sach)) ky ((nang xa) or (nang ma)) hoi. hieu va chat xuc va han tri va thiet*.