Perhaps you should try some spelling variations:
thanh thai » thanh hai, nhanh thai, thanh thao
thanh tai » thanh hai, thanh toan, doanh tai
cua tren » dua tren, ca tren, cua tre
cac xuc » cam xuc, cac nuoc, chat xuc
xuc van » duc van, luc van, vuc van
te sach » toc sach
sach ky » sac ky, sach y, sach ty
hieu ve » hieu va, hieu van
ve cac » va cac, vien cac
o hai » co hai, so hai, o lai
o hoa » do hoa, so hoa, o ha

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 ky nang ((o hoa) or (o hai)). hieu ve cac xuc van ((thanh thai) OR (thanh tai)) cua tren~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ky nang ((o hoa) OR (o hai)). hieu ve cac xuc van ((thanh thai) OR (thanh tai)) cua tren.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ky nang ((o hoa) or (o hai)). hieu ve cac xuc van ((thanh thai) OR (thanh tai)) cua tren".
• Adding a wildcard symbol may retrieve word variants: te sach ky nang ((o hoa) or (o hai)). hieu ve cac xuc van ((thanh thai) OR (thanh tai)) cua tren*.