Perhaps you should try some spelling variations:
hieu vien » hieu hien, hieu viec, thieu nien
hanh doi » thanh doi, hanh noi, hang doi
van hanh » van thanh, ban hanh, van anh
cac nuoc » cap nuoc, hoc nuoc, cua nuoc
doi cua » dai cua, hoi cua
te sach » toc sach
sach ly » sach y, sach lo, sach ty
nang ma » tang ma, sang ma, nang cao
nang xa » nang x, lang xa, mang xa
cua tu » cua tuc, cua su, cua cu

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 xa) or (nang ma)) hoi. hieu vien ((cac nuoc) OR (dat nuoc)) van hanh doi cua tu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ly ((nang xa) OR (nang ma)) hoi. hieu vien ((cac nuoc) OR (dat nuoc)) van hanh doi cua tu.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ly ((nang xa) or (nang ma)) hoi. hieu vien ((cac nuoc) OR (dat nuoc)) van hanh doi cua tu".
• Adding a wildcard symbol may retrieve word variants: te sach ly ((nang xa) or (nang ma)) hoi. hieu vien ((cac nuoc) OR (dat nuoc)) van hanh doi cua tu*.