Perhaps you should try some spelling variations:
dau truc » cau truc, dai truc, doan truc
dua tren » dung tren
vu khach » vu khanh, vu khac, vay khach
dinh vai » dinh van, dinh vi, dinh va
vu sach » vu bach, su sach
va dinh » van dinh, va kinh, va tinh
truc va » thuc va, thuc vat, trung va
van dau » van dao, phan dau
thi van » thi lan, thi hanh, thi nang
nang ma » tang ma, sang ma, nang cao
cuu tre » cua tre, cau tren, cau treo
ma hoi » mai hoi, xa hoi, ma hoa

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((vu sach) or (vu khach)) ky nang ma hoi. thi van dau truc va dinh vai ((dua tren) or (cuu tre))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((vu sach) OR (vu khach)) ky nang ma hoi. thi van dau truc va dinh vai ((dua tren) OR (cuu tre)).
• Adding a wildcard symbol may retrieve word variants: ((vu sach) or (vu khach)) ky nang ma hoi. thi van dau truc va dinh vai ((dua tren) or (cuu tre))*.