Perhaps you should try some spelling variations:
thien hach » thien thanh, hien hanh
hien bach » vien bach, hien hanh, dien sach
tinh dai » trinh dai, tinh da, tinh hai
va triet » va thiet, va trien, ve triet
tu sach » thu sach, su sach, te sach
sach ky » sac ky, sach y, sach ty
nang xa » nang x, lang xa, nang ma
va tinh » may tinh
hoa va » hoa van, hoa xa, hoa vo
dai va » mai 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 xa hoi. hieu ((hien bach) or (thien hach)) hoa va tinh dai va triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky nang xa hoi. hieu ((hien bach) OR (thien hach)) hoa va tinh dai va triet.
• Adding a wildcard symbol may retrieve word variants: tu sach ky nang xa hoi. hieu ((hien bach) or (thien hach)) hoa va tinh dai va triet*.