Perhaps you should try some spelling variations:
cau triet » cau trieu, su triet, cua triet
thu sach » thuat sach, thuoc sach, thu hoach
hanh lai » hanh lam, hanh tai, thanh lap
phan lap » phan dau
tu sach » su sach, te sach, tu cach
nang xa » nang x, lang xa, nang ma
hac duc » hoc duc, ha duc, thach duc
va hac » van hac, va khac, va cac

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 (thu sach)) ky nang xa hoi. lieu va hac duc va ((hanh lai) or (phan lap)) cau triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (thu sach)) ky nang xa hoi. lieu va hac duc va ((hanh lai) OR (phan lap)) cau triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sach) OR (thu sach)) ky nang xa hoi. lieu va hac duc va ((hanh lai) or (phan lap)) cau triet".
• Adding a wildcard symbol may retrieve word variants: ((tu sach) OR (thu sach)) ky nang xa hoi. lieu va hac duc va ((hanh lai) or (phan lap)) cau triet*.