Perhaps you should try some spelling variations:
thien van » thi van
lam truc » lam truoc, nam truc, lam thuoc
va trinh » van trinh, va tinh, lap trinh
dong cua » dung cua, cong cua, huong cua
tu sach » thu sach, su sach, te sach
sach ky » sac ky, sach y, sach ty
nang xa » lang xa, nang ma, mang xa
van lam » van nam
truc va » thuc va, thuc vat, trung va
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: tu sach ky ((nang xa) or (nang x)) hoi. thien van lam truc va trinh ((di cua) or (dong cua)) tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky ((nang xa) OR (nang x)) hoi. thien van lam truc va trinh ((di cua) OR (dong cua)) tre.
• Adding a wildcard symbol may retrieve word variants: tu sach ky ((nang xa) or (nang x)) hoi. thien van lam truc va trinh ((di cua) or (dong cua)) tre*.