Perhaps you should try some spelling variations:
cau tren » cu tren, dau tren, ca tren
danh dau » lanh dao, hang dau, danh tu
hieu van » hieu va, thien van, lieu va
lan kho » lam kho, lan cho, van kho
tang xa » trang xa, tang ma, lang xa
ban kho » ban khi, ban pho, van kho
nam luc » nhan luc, nam thuc, nam duoc
va danh » va dinh, va dan, va hanh
dau cau » mau cau, dat cau, da cau

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

• Performing a fuzzy search may retrieve terms with similar spellings: thu ((ban kho) OR (lan kho)) tang xa hoi. hieu van ((nam luc) or (nang luc)) va danh dau cau tren~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu ((ban kho) OR (lan kho)) tang xa hoi. hieu van ((nam luc) OR (nang luc)) va danh dau cau tren.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu ((ban kho) OR (lan kho)) tang xa hoi. hieu van ((nam luc) or (nang luc)) va danh dau cau tren".
• Adding a wildcard symbol may retrieve word variants: thu ((ban kho) OR (lan kho)) tang xa hoi. hieu van ((nam luc) or (nang luc)) va danh dau cau tren*.