Perhaps you should try some spelling variations:
van khang » van khanh, van thanh, van quang
khang di » hang di, khang vi, khang voi
thuy van » thuy san, thuc van, chu van
te sach » toc sach
cu tren » tu tren, dua tren
nang xa » nang x, lang xa, nang ma
so sanh » do sanh
ve cam » ve cham, ve cac, ve cai
va cam » va cham, va cac, va cao
di cu » di cau, di cua, di du

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) or (so sanh)) ky nang xa hoi. hieu ((ve cam) OR (va cam)) thuy van khang di cu tren~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((te sach) OR (so sanh)) ky nang xa hoi. hieu ((ve cam) OR (va cam)) thuy van khang di cu tren.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((te sach) or (so sanh)) ky nang xa hoi. hieu ((ve cam) OR (va cam)) thuy van khang di cu tren".
• Adding a wildcard symbol may retrieve word variants: ((te sach) or (so sanh)) ky nang xa hoi. hieu ((ve cam) OR (va cam)) thuy van khang di cu tren*.