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
hanh xuc » hanh xu, hanh phuc, hanh duoc
tu sach » thu sach, su sach, te sach
sach ky » sac ky, sach y, sach ty
chu tre » cho tre, chu tri, cuu tre
xuc va » duc va, tuc va, luc va
x hoi » xa hoi, o hoi, x ho

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 ky nang x hoi. hieu hien hanh xuc va ((trinh van) or (trinh toan)) chu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky nang x hoi. hieu hien hanh xuc va ((trinh van) OR (trinh toan)) chu tre.
• Adding a wildcard symbol may retrieve word variants: tu sach ky nang x hoi. hieu hien hanh xuc va ((trinh van) or (trinh toan)) chu tre*.