Perhaps you should try some spelling variations:
tham thuc » nham thuc, pham thuc, tam thuc
van nang » van quang, van ban, van dong
lieu van » lieu va, hieu van, sieu van
van tham » van thanh, van tuan, van chat
thuc dan » thuc hanh, hoc dan, thuc vat
dan hang » ban hang, van hang, dat hang
hang dai » hoang dai, hang tai, hang dau
vu nang » vuc nang, vu dang, v nang
va nang » da nang, cam nang, kha nang
cua tre » cua te, cuu tre, cua triet

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