Perhaps you should try some spelling variations:
nthanh hai » nhanh hai, nhanh ha, thanh ha
thanh hai » thanh phan, thanh hoa, thanh san
hau treo » cau treo, cau theo, cau tren
dau tren » dau tien, dat tren, dau tieng
hieu va » lieu va, hieu qua
xuc van » duc van, luc van, vuc van
sach ly » sach y, sach lo, sach ty
ly nang » ky nang, ly hang, ly vang
te sach » toc sach
va cam » va cham, va cac, va cao
nang o » nang co, nang ho, nang ro
o hoc » co hoc, mo hoc, so hoc

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 ly nang o hoc. hieu va cam xuc van ((thanh hai) or (nthanh hai)) ((hau treo) OR (dau tren))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ly nang o hoc. hieu va cam xuc van ((thanh hai) OR (nthanh hai)) ((hau treo) OR (dau tren)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ly nang o hoc. hieu va cam xuc van ((thanh hai) or (nthanh hai)) ((hau treo) OR (dau tren))".
• Adding a wildcard symbol may retrieve word variants: te sach ly nang o hoc. hieu va cam xuc van ((thanh hai) or (nthanh hai)) ((hau treo) OR (dau tren))*.