Perhaps you should try some spelling variations:
thanh tri » thanh tra, thanh tai, thanh hai
tu sach » thu sach, su sach, te sach
sach ky » sac ky, sach y, sach ty
nang ma » tang ma, sang ma, nang cao
hieu va » lieu va, hieu qua
va cham » va chat, va tham
ma hoi » mai hoi, xa hoi, ma hoa
soc va » hoc va, loc va, doc 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 ky nang ma hoi. hieu va cham soc va ((thanh tri) OR (chinh tri)) va (thiet or thieu)~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky nang ma hoi. hieu va cham soc va ((thanh tri) OR (chinh tri)) va (thiet OR thieu).
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ky nang ma hoi. hieu va cham soc va ((thanh tri) OR (chinh tri)) va (thiet or thieu)".
• Adding a wildcard symbol may retrieve word variants: tu sach ky nang ma hoi. hieu va cham soc va ((thanh tri) OR (chinh tri)) va (thiet or thieu)*.