Perhaps you should try some spelling variations:
cham luc » cham soc, nhan luc, cham cuu
hanh tai » thanh tai, han tai, hinh tai
hang tai » hang va, dung tai
duc tien » duc thien, luc tieng, thuc tien
tu sach » thu sach, su sach, te sach
sach ky » sac ky, sach y, sach ty
cao hoi » cau hoi, co hoi, cao hoc
hieu ve » hieu va, hieu van
ve cham » va cham, ve chat, vu cham
cuc tre » duc tre, cua tre, cuu tre
luc va » duc va, tuc va, loc 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 cao hoi. hieu ve cham luc va ((hanh tai) or (hang tai)) ((cuc tre) or (duc tien))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky nang cao hoi. hieu ve cham luc va ((hanh tai) OR (hang tai)) ((cuc tre) OR (duc tien)).
• Adding a wildcard symbol may retrieve word variants: tu sach ky nang cao hoi. hieu ve cham luc va ((hanh tai) or (hang tai)) ((cuc tre) or (duc tien))*.