Perhaps you should try some spelling variations:
lam trung » lam truong, nam trung, lam trong
thien van » thi van
trung gay » trong gay, trung tam, trung cap
hieu van » hieu va, lieu va, hieu ve
gay tinh » may tinh, tay tinh, giao tinh
tu sach » thu sach, su sach, te sach
sach ky » sac ky, sach y, sach ty
nang xa » nang x, lang xa, nang ma
tinh vi » trinh vi, tinh voi, tinh va
cua tre » cuu tre, cua triet, dua tren
cua te » cua tu

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 hoi. ((hieu van) or (thien van)) lam trung gay tinh vi ((cua tre) OR (cua te))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky nang xa hoi. ((hieu van) OR (thien van)) lam trung gay tinh vi ((cua tre) OR (cua te)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ky nang xa hoi. ((hieu van) or (thien van)) lam trung gay tinh vi ((cua tre) OR (cua te))".
• Adding a wildcard symbol may retrieve word variants: tu sach ky nang xa hoi. ((hieu van) or (thien van)) lam trung gay tinh vi ((cua tre) OR (cua te))*.