Perhaps you should try some spelling variations:
cac trinh » lap trinh, cac thanh, co trinh
cac tinh » dac tinh, cuu tinh, ha tinh
hoc duoc » hoc nuoc, hoa duoc, hoc dung
dat cua » dai cua, day cua, mat cua
vat cua » mat cua, bat cua, hat cua
hieu ve » hieu va, hieu van
lang xa » lang ha, dang xay, lang van
ky lang » ky nang, ky dang, ky tang
sac ky » cac ky, sai ky
ve hoc » te hoc, va hoc, vi hoc
su sac » su sach, su cac, su xac

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

• Performing a fuzzy search may retrieve terms with similar spellings: su sac ky lang xa hoi. hieu ve hoc duoc ((cac trinh) or (cac tinh)) ((vat cua) OR (dat cua)) tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sac ky lang xa hoi. hieu ve hoc duoc ((cac trinh) OR (cac tinh)) ((vat cua) OR (dat cua)) tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sac ky lang xa hoi. hieu ve hoc duoc ((cac trinh) or (cac tinh)) ((vat cua) OR (dat cua)) tre".
• Adding a wildcard symbol may retrieve word variants: su sac ky lang xa hoi. hieu ve hoc duoc ((cac trinh) or (cac tinh)) ((vat cua) OR (dat cua)) tre*.