Perhaps you should try some spelling variations:
thuoc sach » hoc sach, nuoc sach, thuat sach
cham luc » cham soc, nhan luc, cham cuu
tinh hai » tinh thai, tinh chat, trinh han
tinh bai » tinh bac, hinh bai, tinh bao
sach ky » sac ky, sach y, sach ty
ve cham » va cham, ve chat, vu cham
hieu ve » hieu va, hieu van
nang xa » nang x, lang xa, nang ma
luc va » duc va, tuc va, loc va
ca tre » ca tren, cua tre, va tre
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: thuoc sach ky nang xa hoi. hieu ve cham luc va ((tinh bai) OR (tinh hai)) ((ca tre) or (ca tru))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thuoc sach ky nang xa hoi. hieu ve cham luc va ((tinh bai) OR (tinh hai)) ((ca tre) OR (ca tru)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "thuoc sach ky nang xa hoi. hieu ve cham luc va ((tinh bai) OR (tinh hai)) ((ca tre) or (ca tru))".
• Adding a wildcard symbol may retrieve word variants: thuoc sach ky nang xa hoi. hieu ve cham luc va ((tinh bai) OR (tinh hai)) ((ca tre) or (ca tru))*.