Perhaps you should try some spelling variations:
cach thuc » cac thu
anh thuc » am thuc, dan thuc, anh tu
luoc van » luoc can, luoc va, luot van
nano xa » nano va, nano bac, nano cau
hieu ve » hieu va, hieu van
luc van » luu van, duc van, luc va
ve cam » ve cham, ve cac, va cam
vi cua » vai cua, di cua
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 ((cach thuc) OR (anh thuc)) nano xa hoi. hieu ve cam ((luc van) or (luoc van)) hanh vi cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((cach thuc) OR (anh thuc)) nano xa hoi. hieu ve cam ((luc van) OR (luoc van)) hanh vi cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu ((cach thuc) OR (anh thuc)) nano xa hoi. hieu ve cam ((luc van) or (luoc van)) hanh vi cua te".
• Adding a wildcard symbol may retrieve word variants: tu ((cach thuc) OR (anh thuc)) nano xa hoi. hieu ve cam ((luc van) or (luoc van)) hanh vi cua te*.