Perhaps you should try some spelling variations:
nang xa » nang x, lang xa, nang ma
hieu va » lieu va, hieu qua
bac hoc » bai hoc, bac ho
va tinh » may tinh
tinh di » tinh doi, trinh di, tinh da
cuu tre » cua tre, cau tren, cau treo
tu van » tu va
va bac » van bac, va cac, va bai
cua tu » cua tuc, cua su, cua cu

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

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