Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
thuc day » thuc dan, thuc vat
thanh le » thinh le, thanh ve, thanh de
hanh le » hanh ve, hanh de, manh le
su sach » so sach, vu sach
ve cac » va cac, vien cac
y nang » ky nang, ly nang, v nang
ve cam » ve cham, va cam, ve cai

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

• Performing a fuzzy search may retrieve terms with similar spellings: su sach y nang x ho. hieu ((ve cam) or (ve cac)) thuc day ((hanh le) OR (thanh le)) cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach y nang x ho. hieu ((ve cam) OR (ve cac)) thuc day ((hanh le) OR (thanh le)) cua triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach y nang x ho. hieu ((ve cam) or (ve cac)) thuc day ((hanh le) OR (thanh le)) cua triet".
• Adding a wildcard symbol may retrieve word variants: su sach y nang x ho. hieu ((ve cam) or (ve cac)) thuc day ((hanh le) OR (thanh le)) cua triet*.