Perhaps you should try some spelling variations:
thu sach » tu sach, thuat sach, thuoc sach
cham luc » cham soc, nhan luc, cham cuu
dau tren » dau tien, dat tren, dau tieng
sach ky » sac ky, sach y, sach ty
va cham » va chat, va tham
va hanh » van hanh, va thanh, va danh
va tinh » may tinh
ma hoi » mai hoi, ma hoa, me hoi

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 ky nang ((ma hoi) or (xa hoi)). lieu va cham luc ((va hanh) or (va tinh)) bi dau tren~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach ky nang ((ma hoi) OR (xa hoi)). lieu va cham luc ((va hanh) OR (va tinh)) bi dau tren.
• Adding a wildcard symbol may retrieve word variants: thu sach ky nang ((ma hoi) or (xa hoi)). lieu va cham luc ((va hanh) or (va tinh)) bi dau tren*.