Perhaps you should try some spelling variations:
nang tai » hang tai, sang tai, dung tai
tang tai » hang tai, dung tai, sang tao
tu sach » thu sach, su sach, te sach
cao hoi » cau hoi, co hoi, cao hoc
hieu va » lieu va, hieu qua
cac duc » cac du, cao duc, cac dac
cuu tre » cua tre, cau tren, cau treo
y nang » ky nang, ly nang, v nang

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 y nang cao hoi. hieu va cac duc va ((nang tai) OR (tang tai)) cuu tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach y nang cao hoi. hieu va cac duc va ((nang tai) OR (tang tai)) cuu tre".
• Adding a wildcard symbol may retrieve word variants: tu sach y nang cao hoi. hieu va cac duc va ((nang tai) OR (tang tai)) cuu tre*.