Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
van hanh » van thanh, van anh, van ban
ban hanh » ban hang
te sach » toc sach
ty nang » ty xang, ty hang, ly nang
hanh xu » hanh tu, hanh sua, hanh cua
va hanh » va thanh, va danh, dao hanh
cua tre » cua te, cuu tre, cua triet
du cua » duy cua, dau cua, dum cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: te sach ((ty nang) or (ky nang)) xa hoi. hieu van hanh xu ((va hanh) OR (ban hanh)) du cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ((ty nang) OR (ky nang)) xa hoi. hieu van hanh xu ((va hanh) OR (ban hanh)) du cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ((ty nang) or (ky nang)) xa hoi. hieu van hanh xu ((va hanh) OR (ban hanh)) du cua tre".
• Adding a wildcard symbol may retrieve word variants: te sach ((ty nang) or (ky nang)) xa hoi. hieu van hanh xu ((va hanh) OR (ban hanh)) du cua tre*.