Perhaps you should try some spelling variations:
thanh hai » thanh phan, thanh hoa, thanh san
thanh vai » thanh van, thanh tai, thanh oai
cau tren » cu tren, dau tren, ca tren
hieu van » hieu va, thien van, lieu va
nam qua » nam quan, nam cua, nam mua
qua ban » cua ban, qua quan
sac ky » cac ky, sai ky
ma hoi » mai hoi, xa hoi, me hoi
tu sac » tu sach, tu cac, tu san

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu sac ky nang ((ma hoi) or (ma hoa)). hieu van nam qua ban ((thanh vai) or (thanh hai)) cau tren~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sac ky nang ((ma hoi) OR (ma hoa)). hieu van nam qua ban ((thanh vai) OR (thanh hai)) cau tren.
• Adding a wildcard symbol may retrieve word variants: tu sac ky nang ((ma hoi) or (ma hoa)). hieu van nam qua ban ((thanh vai) or (thanh hai)) cau tren*.