Perhaps you should try some spelling variations:
van hanh » van thanh, ban hanh, van anh
chat xuc » chat huu, cam xuc, chao xu
xuc van » duc van, luc van, xuc ban
ve chat » va chat, van chat
sach ty » sach y, sach thu, xach tay
hieu ve » hieu va, hieu van
nang xa » nang x, lang xa, nang ma
sach tu » sach thu, cach tu, sach uu
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: doc ((sach ty) or (sach tu)) nang xa hoi. hieu ve chat xuc van hanh ((vi cua) OR (di cua)) tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doc ((sach ty) OR (sach tu)) nang xa hoi. hieu ve chat xuc van hanh ((vi cua) OR (di cua)) tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doc ((sach ty) or (sach tu)) nang xa hoi. hieu ve chat xuc van hanh ((vi cua) OR (di cua)) tre".
• Adding a wildcard symbol may retrieve word variants: doc ((sach ty) or (sach tu)) nang xa hoi. hieu ve chat xuc van hanh ((vi cua) OR (di cua)) tre*.