Perhaps you should try some spelling variations:
thanh tai » thanh hai, thanh toan, doanh tai
hieu vien » hieu viec, thieu nien, hieu tieng
hieu hien » bieu hien, dieu hien, chieu chien
cac thoi » cac toi, cac hop, cac tro
tang van » dang van, hoang van, trong van
va thanh » gia thanh, ban thanh, va tinh
tai cua » thai cua, tai cuc, tri cua
thoi va » hoi va, thai va, tho va
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 x) or (tang van)) hoi. ((hieu vien) OR (hieu hien)) cac thoi va thanh tai cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sac ky ((nang x) OR (tang van)) hoi. ((hieu vien) OR (hieu hien)) cac thoi va thanh tai cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sac ky ((nang x) or (tang van)) hoi. ((hieu vien) OR (hieu hien)) cac thoi va thanh tai cua te".
• Adding a wildcard symbol may retrieve word variants: te sac ky ((nang x) or (tang van)) hoi. ((hieu vien) OR (hieu hien)) cac thoi va thanh tai cua te*.