Perhaps you should try some spelling variations:
hieu viec » nhieu viec, hieu ve, sieu viet
lang mai » lang dai, lang hai, lang man
trinh di » trinh do, trinh dien, trinh dinh
va trinh » van trinh, va tinh, lap trinh
nang mai » nang ma, nang tai, nang cai
tu sach » thu sach, te sach, tu cach
viec da » viec dat, vien da, viec va
su sach » so sach, vu sach
cua tre » cua te, cuu tre, cua triet
da tuc » dao tuc, va tuc, da tac
tuc va » thuc va, truc va, tuc xa
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) or (su sach)) ky ((nang mai) OR (lang mai)) hoi. hieu viec da tuc va trinh di cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (su sach)) ky ((nang mai) OR (lang mai)) hoi. hieu viec da tuc va trinh di cua tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sach) or (su sach)) ky ((nang mai) OR (lang mai)) hoi. hieu viec da tuc va trinh di cua tre*".