Perhaps you should try some spelling variations:
thuat sach » thuat lanh, thuat san
nhan tai » hang tai, van tai, toan tai
hieu van » hieu va, thien van, lieu va
nang xa » nang x, lang xa, nang ma
van dau » van dao, phan dau
cua tre » cuu tre, cua triet, dua tren
sach ky » sac ky, sach y, sach ty
tuc cua » thuc cua, tac cua, luc cua
cua te » cua tu
tuc ca » tuc cac, tuc xa, tuc co

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

• Performing a fuzzy search may retrieve terms with similar spellings: thuat sach ky nang xa hoi. hieu van dau ((tuc ca) OR (tuc cua)) nhan tai ((cua tre) or (cua te))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thuat sach ky nang xa hoi. hieu van dau ((tuc ca) OR (tuc cua)) nhan tai ((cua tre) OR (cua te)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "thuat sach ky nang xa hoi. hieu van dau ((tuc ca) OR (tuc cua)) nhan tai ((cua tre) or (cua te))".
• Adding a wildcard symbol may retrieve word variants: thuat sach ky nang xa hoi. hieu van dau ((tuc ca) OR (tuc cua)) nhan tai ((cua tre) or (cua te))*.