Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
doan thi » dan thi, doanh tai, hoang thi
dua tren » dung tren
bach ty » sach ty, xach tay, bach thu
ty nang » ky nang, ty xang, ty hang
va doan » va doanh, van doan, va dan
cuu tre » cua tre, cau tren, cau treo
x hoi » xa hoi, o hoi, x ho

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

• Performing a fuzzy search may retrieve terms with similar spellings: vu bach ty nang x hoi. hieu van ((cau truc) or (va thuc)) va doan thi ((dua tren) or (cuu tre))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu bach ty nang x hoi. hieu van ((cau truc) OR (va thuc)) va doan thi ((dua tren) OR (cuu tre)).
• Adding a wildcard symbol may retrieve word variants: vu bach ty nang x hoi. hieu van ((cau truc) or (va thuc)) va doan thi ((dua tren) or (cuu tre))*.