Perhaps you should try some spelling variations:
thanh thai » thanh hai, thanh tai, nhanh thai
dang xay » dang van
thai cua » than cua, tai cuc, tri cua
nang xa » nang x, lang xa, nang ma
hieu va » lieu va, hieu qua
cac hoc » cach hoc, cac hop, bac hoc
hoc gia » hoc giao, hoc giai, toc gia
te sac » te sach, te cac, te san
sac ky » cac ky, sai ky
cua te » cua tu

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

• Performing a fuzzy search may retrieve terms with similar spellings: te sac ky ((nang xa) or (((dang xay) OR (van xay)))) hoi. hieu va cac hoc gia thanh thai cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sac ky ((nang xa) OR (((dang xay) OR (van xay)))) hoi. hieu va cac hoc gia thanh thai cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sac ky ((nang xa) or (((dang xay) OR (van xay)))) hoi. hieu va cac hoc gia thanh thai cua te".
• Adding a wildcard symbol may retrieve word variants: te sac ky ((nang xa) or (((dang xay) OR (van xay)))) hoi. hieu va cac hoc gia thanh thai cua te*.