Perhaps you should try some spelling variations:
tang lap » sang lap, tan lap, tang ap
cam truc » cau truc, nam truc, lam truoc
su sach » so sach
vu sach » vu bach, vu khach
ky tang » ky nang, ky dang, kho tang
lap hai » lap tai, lap lai, lap hoat
hieu ve » hieu va, hieu van
truc va » thuc va, thuc vat, trung va
dan vi » doan vi, don vi, gan vi
dan va » doan va, dan ca, ban va
ve cam » ve cham, ve cac, va cam
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: ((su sach) or (vu sach)) ky tang lap hai. hieu ve cam truc va ((dan vi) OR (dan va)) cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((su sach) OR (vu sach)) ky tang lap hai. hieu ve cam truc va ((dan vi) OR (dan va)) cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((su sach) or (vu sach)) ky tang lap hai. hieu ve cam truc va ((dan vi) OR (dan va)) cua te".
• Adding a wildcard symbol may retrieve word variants: ((su sach) or (vu sach)) ky tang lap hai. hieu ve cam truc va ((dan vi) OR (dan va)) cua te*.