Perhaps you should try some spelling variations:
hieu vien » hieu hien, hieu viec, thieu nien
toc sach » hoc sach, doc sach, thuoc sach
vien cac » vien bach, vien dai, vien da
van hanh » van thanh, ban hanh, van anh
sach tu » sach thu, cach tu, sach ty
tu nang » tru nang, tu nong, tu nano
nang ma » tang ma, sang ma, nang cao
cac xuc » cam xuc, cac nuoc, chat xuc
xuc van » duc van, luc van, vuc van
dao cua » day cua, dan cua, do cua
ma hoi » mai hoi, xa hoi, ma hoa

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

• Performing a fuzzy search may retrieve terms with similar spellings: toc sach tu nang ma hoi. hieu vien cac xuc van hanh ((dao cua) OR (dai cua)) su~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "toc sach tu nang ma hoi. hieu vien cac xuc van hanh ((dao cua) OR (dai cua)) su".
• Adding a wildcard symbol may retrieve word variants: toc sach tu nang ma hoi. hieu vien cac xuc van hanh ((dao cua) OR (dai cua)) su*.