Perhaps you should try some spelling variations:
thuat sach » thuat lanh, thuat san
ban hang » ngan hang
va trien » va truyen, va thiet, va tuyen
su triet » su viet, su tien, ve triet
nang xa » nang x, lang xa, nang ma
hieu va » lieu va, hieu qua
va nang » van nang, da nang, cam nang
y nang » ky nang, ly nang, v nang

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: thuat sach y nang xa hoi. hieu va nang luc ((ban hanh) or (ban hang)) vi ((va trien) or (su triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thuat sach y nang xa hoi. hieu va nang luc ((ban hanh) OR (ban hang)) vi ((va trien) OR (su triet)).
• Adding a wildcard symbol may retrieve word variants: thuat sach y nang xa hoi. hieu va nang luc ((ban hanh) or (ban hang)) vi ((va trien) or (su triet))*.