Perhaps you should try some spelling variations:
hieu vien » hieu hien, hieu viec, thieu nien
van thanh » ban thanh, van tuan
van hanh » ban hanh, van anh, van ban
vien cac » vien bach, vien dai, vien da
hoc sach » hoc sinh, hoc anh
nang ma » tang ma, sang ma, nang cao
tu nang » tru nang, tu nong, tu nano
cac xuc » cam xuc, cac nuoc, chat xuc
hoc cac » hoc cao
dao cua » dai cua, day cua, dan cua
ma hoi » mai hoi, xa hoi, ma hoa
cua su » qua su

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((hoc sach) OR (hoc cac)) tu nang ma hoi. hieu vien cac xuc ((van hanh) or (van thanh)) dao cua su~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((hoc sach) OR (hoc cac)) tu nang ma hoi. hieu vien cac xuc ((van hanh) OR (van thanh)) dao cua su.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((hoc sach) OR (hoc cac)) tu nang ma hoi. hieu vien cac xuc ((van hanh) or (van thanh)) dao cua su".
• Adding a wildcard symbol may retrieve word variants: ((hoc sach) OR (hoc cac)) tu nang ma hoi. hieu vien cac xuc ((van hanh) or (van thanh)) dao cua su*.