Perhaps you should try some spelling variations:
nam thuc » nam thuoc, am thuc, nam thu
hanh dao » thanh dat, thanh dam, doanh dao
hieu van » hieu va, thien van, lieu va
tu sach » thu sach, su sach, te sach
cua tre » cua te, cuu tre, cua triet
sach tu » sach thu, cach tu, sach ty
cam tuc » cam xuc, cam tu, dam thuc
nang xa » nang x, lang xa, nang ma
tu nang » tru nang, tu nong, tu nano

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu sach tu nang xa hoi. hieu van ((cam tuc) or (nam thuc)) va ((hanh dao) OR (lanh dao)) cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach tu nang xa hoi. hieu van ((cam tuc) OR (nam thuc)) va ((hanh dao) OR (lanh dao)) cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach tu nang xa hoi. hieu van ((cam tuc) or (nam thuc)) va ((hanh dao) OR (lanh dao)) cua tre".
• Adding a wildcard symbol may retrieve word variants: tu sach tu nang xa hoi. hieu van ((cam tuc) or (nam thuc)) va ((hanh dao) OR (lanh dao)) cua tre*.