Perhaps you should try some spelling variations:
thuat sach » thuat lanh, thuat san
tang ma » mang may, tang van
hieu va » lieu va
cac xuc » cac nuoc, chat xuc, cac cuoc
minh de » menh de, minh ve, sinh de
sach 6 » sach y, sach 2
ma hoi » mai hoi, xa hoi, ma hoa
de cua » le cua, te cua, dieu cua
cua tu » cua tuc, cua su, cua cu

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

• Performing a fuzzy search may retrieve terms with similar spellings: thuat sach 6 tang ma hoi. ((hieu va) or (hieu qua)) ((cac xuc) OR (cam xuc)) van minh de cua tu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thuat sach 6 tang ma hoi. ((hieu va) OR (hieu qua)) ((cac xuc) OR (cam xuc)) van minh de cua tu.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thuat sach 6 tang ma hoi. ((hieu va) or (hieu qua)) ((cac xuc) OR (cam xuc)) van minh de cua tu".
• Adding a wildcard symbol may retrieve word variants: thuat sach 6 tang ma hoi. ((hieu va) or (hieu qua)) ((cac xuc) OR (cam xuc)) van minh de cua tu*.