Perhaps you should try some spelling variations:
su triet » su viet, su tien, ve triet
thu sach » thuat sach, thuoc sach, thu hoach
hanh ve » hanh vi, hanh va, hanh kem
va hanh » van hanh, va thanh, va danh
tu sach » su sach, te sach, tu cach
nang xa » nang x, lang xa, nang ma
ve cam » ve cham, va cam, ve cai
ve cac » va cac, vien cac
xuc va » duc va, tuc va, luc va
y nang » ky nang, ly nang, v nang
ve su » va su

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)) y nang xa hoi. hieu ((ve cam) or (ve cac)) xuc va hanh ve su triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (thu sach)) y nang xa hoi. hieu ((ve cam) OR (ve cac)) xuc va hanh ve su triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sach) OR (thu sach)) y nang xa hoi. hieu ((ve cam) or (ve cac)) xuc va hanh ve su triet".
• Adding a wildcard symbol may retrieve word variants: ((tu sach) OR (thu sach)) y nang xa hoi. hieu ((ve cam) or (ve cac)) xuc va hanh ve su triet*.