Perhaps you should try some spelling variations:
su triet » su viet, su tien, ve triet
hanh noi » ha noi, hanh vi, nang noi
hanh doi » thanh doi, hang doi, hanh moi
tuc van » thuc van, truc van, tuc va
su sach » so sach, vu sach
hieu ve » hieu va, hieu van
nang xa » nang x, lang xa, nang ma
bo sach » co sach, hoc sach
cam tuc » cam xuc, cam tu, nam thuc
ve cam » ve cham, ve cac, va cam

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) or (bo sach)) ky nang xa hoi. hieu ve cam tuc van ((hanh doi) OR (hanh noi)) su triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((su sach) OR (bo sach)) ky nang xa hoi. hieu ve cam tuc van ((hanh doi) OR (hanh noi)) su triet*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((su sach) or (bo sach)) ky nang xa hoi. hieu ve cam tuc van ((hanh doi) OR (hanh noi)) su triet*".