Perhaps you should try some spelling variations:
tham tuc » tham thuc, thai tuc, nham thuc
vu nang » vuc nang, vu dang, v nang
va nang » van nang, da nang, cam nang
va tham » van tham, va cham, va thanh
xa hang » va hang, xa bang, ban hang
xa hung » ba hung, ha hung, la hung
cua tre » cua te, cuu tre, cua triet
di cua » dai cua, doi cua, de cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc sinh ((vu nang) or (va nang)) xa hoi. lieu va tham tuc ((xa hang) OR (xa hung)) di cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc sinh ((vu nang) OR (va nang)) xa hoi. lieu va tham tuc ((xa hang) OR (xa hung)) di cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc sinh ((vu nang) or (va nang)) xa hoi. lieu va tham tuc ((xa hang) OR (xa hung)) di cua tre".
• Adding a wildcard symbol may retrieve word variants: hoc sinh ((vu nang) or (va nang)) xa hoi. lieu va tham tuc ((xa hang) OR (xa hung)) di cua tre*.