Perhaps you should try some spelling variations:
hieu vien » hieu hien, hieu viec, thieu nien
cac nuoc » cap nuoc, hoc nuoc, dat nuoc
hanh doi » thanh doi, hanh noi, hang doi
van hanh » van thanh, ban hanh, van anh
nuoc van » nuoc va, nuoc san, luoc van
vien cac » vien bach, vien dai, vien da
te sach » toc sach
nang xa » nang x, lang xa, mang xa
doi cua » dai cua, hoi cua
nang ma » sang ma, nang cao, mang may
tang ma » mang may, tang van
sach ly » sach y, sach lo, sach ty
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) OR (tang ma)))) hoi. hieu vien cac 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) OR (tang ma)))) hoi. hieu vien cac 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) OR (tang ma)))) hoi. hieu vien cac nuoc van hanh doi cua tu".
• Adding a wildcard symbol may retrieve word variants: te sach ly ((nang xa) or (((nang ma) OR (tang ma)))) hoi. hieu vien cac nuoc van hanh doi cua tu*.