Perhaps you should try some spelling variations:
dau tren » dau tien, dat tren, dau tieng
cham tuc » nham thuc, pham thuc, tham thuc
tu sach » thu sach, su sach, te sach
nang xa » lang xa, nang ma, mang xa
hieu va » lieu va, hieu qua
va cham » va chat, va tham
tuc va » thuc va, truc va, tuc xa
va dan » ca dan, va dao, va dau
dan ve » ban ve, dan va, dan viet
ve dau » va dau, ve du, ke dau
tu sac » tu cac, tu san, tu bac

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((tu sac) OR (tu sach)) ky ((nang xa) or (nang x)) hoi. hieu va cham tuc va dan ve dau tren~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sac) OR (tu sach)) ky ((nang xa) OR (nang x)) hoi. hieu va cham tuc va dan ve dau tren.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sac) OR (tu sach)) ky ((nang xa) or (nang x)) hoi. hieu va cham tuc va dan ve dau tren".
• Adding a wildcard symbol may retrieve word variants: ((tu sac) OR (tu sach)) ky ((nang xa) or (nang x)) hoi. hieu va cham tuc va dan ve dau tren*.