Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
van cham » van chat, van tham, va cham
vinh cuu » dinh cuu, sinh cua, dinh cu
ky tang » ky nang, kho tang, ky trong
ky dang » ky nang, ky danh
va hanh » van hanh, va thanh, va danh
te sac » te sach, te cac, te san
soc va » hoc va, loc va, doc va
vi cuu » vi luu

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

• Performing a fuzzy search may retrieve terms with similar spellings: te sac ((ky tang) OR (ky dang)) xa hoi. hieu van cham soc va hanh ((vi cuu) or (vinh cuu)) tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sac ((ky tang) OR (ky dang)) xa hoi. hieu van cham soc va hanh ((vi cuu) OR (vinh cuu)) tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sac ((ky tang) OR (ky dang)) xa hoi. hieu van cham soc va hanh ((vi cuu) or (vinh cuu)) tre".
• Adding a wildcard symbol may retrieve word variants: te sac ((ky tang) OR (ky dang)) xa hoi. hieu van cham soc va hanh ((vi cuu) or (vinh cuu)) tre*.