Perhaps you should try some spelling variations:
cau tren » cu tren, dau tren, ca tren
thu nang » thi nang, thu hang, thu bang
cham tuc » nham thuc, pham thuc, tham thuc
hieu va » lieu va, hieu qua
vai cau » va cau, van cau, vai cac
dan vai » dan va, dan tai, dan vat
tu sach » thu sach, te sach, tu cach
hieu ve » hieu van
nang xa » nang x, lang xa, nang ma
su sach » so sach, vu sach
tuc va » thuc va, truc va, tuc xa
va dan » ca dan, va dao, va dau

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)) thu nang xa hoi. ((hieu ve) or (hieu va)) cham tuc va dan vai cau tren~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (su sach)) thu nang xa hoi. ((hieu ve) OR (hieu va)) cham tuc va dan vai cau tren.
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (su sach)) thu nang xa hoi. ((hieu ve) or (hieu va)) cham tuc va dan vai cau tren*.