Perhaps you should try some spelling variations:
tan hanh » tan thanh, tang hanh, toan hanh
su triet » su viet, su tien, ve triet
tu sach » thu sach, su sach, te sach
nang xa » nang x, lang xa, nang ma
hanh ve » hanh vi, hanh va, hanh kem
y nang » ky nang, ly nang, v nang
ve cam » ve cham, ve cac, va cam
va co » vo co
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 y nang xa hoi. hieu ((ve cam) or (va co)) duc tan hanh ve su triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach y nang xa hoi. hieu ((ve cam) OR (va co)) duc tan hanh ve su triet*.