Perhaps you should try some spelling variations:
hieu vien » hieu hien, hieu viec, thieu nien
vien cac » vien bach, vien dai, vien da
hanh dai » hanh tai, hanh dao, vanh dai
te sach » toc sach
sach ly » sach y, sach lo, sach ty
ly nang » ky nang, ly hang, ly vang
nang xa » nang x, lang xa, nang ma
xuc van » duc van, vuc van, xuc ban
luc van » luoc van, luu van, duc van
cua duc » cua nuoc, cua quoc
cua tuc » cua tu, cua thuoc, luat tuc

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