Perhaps you should try some spelling variations:
qua chau » quy chau, qua cham, qua chu
chau phu » chau phi, chau au, chau tho
va trien » va truyen, va thiet, va tuyen
ve triet » su triet
sach ky » sach y, sach ty, sach kem
nang xa » nang x, lang xa, nang ma
va hanh » van hanh, va thanh, va danh
sac ky » cac ky, sai ky
phu va » phuc va, phu la, phu da

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

• If you are trying to use Boolean operators, they must be ALL CAPS: so ((sach ky) OR (sac ky)) nang xa hoi. hieu qua chau phu va hanh vi ((va trien) OR (ve triet))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "so ((sach ky) OR (sac ky)) nang xa hoi. hieu qua chau phu va hanh vi ((va trien) or (ve triet))~".
• Adding a wildcard symbol may retrieve word variants: so ((sach ky) OR (sac ky)) nang xa hoi. hieu qua chau phu va hanh vi ((va trien) or (ve triet))*.