Perhaps you should try some spelling variations:
vay khac » vay khach, va khac, tay khao
khac hau » khi hau
hau tang » ha tang, hao tang, sau tang
hieu van » hieu va, thien van, lieu va
chat xuc » chat huu, cam xuc, chat cua
tang xa » trang xa, tang ma, lang xa
va hanh » van hanh, va thanh, va danh
vi su » va su, ve su, ki su
kien » bien, vien, tien

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

• Performing a fuzzy search may retrieve terms with similar spellings: vay khac hau tang xa hoi. hieu van ((chat xuc) OR (chao xu)) va hanh vi su kien~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "vay khac hau tang xa hoi. hieu van ((chat xuc) OR (chao xu)) va hanh vi su kien".
• Adding a wildcard symbol may retrieve word variants: vay khac hau tang xa hoi. hieu van ((chat xuc) OR (chao xu)) va hanh vi su kien*.