Perhaps you should try some spelling variations:
tu sach » thu sach, te sach, tu cach
hai chu » hai chau, hoi chu, hai chi
hai cuu » hai cua, hai cuc, thai cua
va manh » van manh, va danh, va hanh
cao duc » dao duc, cao suc, giao duc
nang xa » nang x, lang xa, nang ma
ty nang » ky nang, ty xang, ty hang
su sach » so sach, vu sach
va cao » va cac, va co, va dao

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) OR (su sach)) ty nang xa hoi. lieu va cao duc va manh ((hai cuu) or (hai chu)) tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (su sach)) ty nang xa hoi. lieu va cao duc va manh ((hai cuu) OR (hai chu)) tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sach) OR (su sach)) ty nang xa hoi. lieu va cao duc va manh ((hai cuu) or (hai chu)) tre".
• Adding a wildcard symbol may retrieve word variants: ((tu sach) OR (su sach)) ty nang xa hoi. lieu va cao duc va manh ((hai cuu) or (hai chu)) tre*.