Perhaps you should try some spelling variations:
hieu phan » phieu phan, lieu phan, hieu pham
phan dau » phan tu, hang dau
van hanh » van thanh, ban hanh, van anh
te sach » toc sach
dau xuc » dau xac, dau xua, dau nuoc
xuc van » duc van, luc van, vuc van
v nang » va nang, vu nang, van nang
vi cua » vai cua
di cua » dai cua, doi cua, de 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 ((ky nang) or (v nang)) xa hoi. hieu phan dau xuc van hanh ((vi cua) OR (di cua)) tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ((ky nang) OR (v nang)) xa hoi. hieu phan dau xuc van hanh ((vi cua) OR (di cua)) tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ((ky nang) or (v nang)) xa hoi. hieu phan dau xuc van hanh ((vi cua) OR (di cua)) tre*".