Perhaps you should try some spelling variations:
thanh vai » thanh hai, thanh van, thanh va
thanh tai » thanh hai, thanh toan, doanh tai
thanh oai » thanh hai, thanh toan, thanh hoa
cua tre » cua te, cuu tre, cua triet
qua ban » cua ban, qua quan
cam qua » cau qua, cac qua, cay qua
hieu va » lieu va, hieu qua
nang ma » tang ma, sang ma, nang cao
sac ky » cac ky, sai ky
va cam » va cham, va cac, va cao
ma hoi » mai hoi, xa hoi, ma hoa
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. hieu va cam qua ban ((((thanh vai) OR (thanh oai))) or (thanh tai)) cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sac ky nang ma hoi. hieu va cam qua ban ((((thanh vai) OR (thanh oai))) OR (thanh tai)) cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sac ky nang ma hoi. hieu va cam qua ban ((((thanh vai) OR (thanh oai))) or (thanh tai)) cua tre".
• Adding a wildcard symbol may retrieve word variants: tu sac ky nang ma hoi. hieu va cam qua ban ((((thanh vai) OR (thanh oai))) or (thanh tai)) cua tre*.