Perhaps you should try some spelling variations:
va trien » va truyen, va thiet, va tuyen
hanh va » hang va, hanh vi
va hanh » van hanh, va thanh, va danh
van lam » van nam
sach ky » sac ky, sach ty, sach kem
lang xa » lang ha, dang xay, lang van
van cam » van nam, van cau, van dam
xuc va » duc va, tuc va, luc va
va va » va van, va vua, va vai

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

• Performing a fuzzy search may retrieve terms with similar spellings: te ((sach ky) or (sach y)) lang xa hoi. hieu ((van cam) OR (van lam)) xuc va hanh va va trien~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te ((sach ky) OR (sach y)) lang xa hoi. hieu ((van cam) OR (van lam)) xuc va hanh va va trien.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te ((sach ky) or (sach y)) lang xa hoi. hieu ((van cam) OR (van lam)) xuc va hanh va va trien".
• Adding a wildcard symbol may retrieve word variants: te ((sach ky) or (sach y)) lang xa hoi. hieu ((van cam) OR (van lam)) xuc va hanh va va trien*.