Perhaps you should try some spelling variations:
trinh toan » tinh toan, thanh toan, trinh han
hieu hien » bieu hien, dieu hien, chieu chien
hien hanh » dieu hanh
trinh van » trinh han, trinh quan, dinh van
chu tre » cho tre, chu tri, cuu tre
tu sac » tu sach, tu cac, tu san
luc va » duc va, tuc va, loc va
sac ky » cac ky, sai ky
xuc va » duc va, tuc va, xac va
x hoi » xa hoi, o hoi, x ho

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

• If you are trying to use Boolean operators, they must be ALL CAPS: tu sac ky nang x hoi. hieu hien hanh ((xuc va) OR (luc va)) ((trinh van) OR (trinh toan)) chu tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sac ky nang x hoi. hieu hien hanh ((xuc va) OR (luc va)) ((trinh van) or (trinh toan)) chu tre~".
• Adding a wildcard symbol may retrieve word variants: tu sac ky nang x hoi. hieu hien hanh ((xuc va) OR (luc va)) ((trinh van) or (trinh toan)) chu tre*.