Perhaps you should try some spelling variations:
nang hoc » nang doc, nang luc, dong hoc
vien cua » viec cua, dien cua, tien cua
cua viet » ca viet, hoa viet, cua vat
tu sach » thu sach, su sach, te sach
sach ky » sac ky, sach y, sach ty
nang ho » nang co, tang ho, nang cao
hieu ve » hieu va, hieu van
truc va » thuc va, thuc vat, trung va
va nhan » van nhan, ca nhan, va phan
ve cau » ke cau, va cau, ve cac

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 ho) or (nang hoc)) hoi. hieu ve cau truc va nhan vien cua viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky ((nang ho) OR (nang hoc)) hoi. hieu ve cau truc va nhan vien cua viet.
• Adding a wildcard symbol may retrieve word variants: tu sach ky ((nang ho) or (nang hoc)) hoi. hieu ve cau truc va nhan vien cua viet*.